Previous Year Questions
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5 L of an alkane requires 25 L of oxygen forits complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is :[Main 9 Apr 2016]
What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ?[Main 9 Apr 2016]
The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess in the presence of conc. HCl ( assuming 100% conversion)is :[Main 9 Apr 2016]
If 100 mole of decompose at 1 bar and 300 K, the work done (kJ) by one mole of as it expands against 1 bar pressure is : [Main 10 Apr 2016]
The species in which the N atom is in a state of sp hybridization is[Main 2016]
Match the items in Column I with its main use listed in Column II :Column - IColumn - II(A) Silica gel (i) Transistor(B) Silicon(ii) Ion-exchanger(C) Silicone (iii) Drying agent(D) Silicate(iv) Sealan
The reaction of propene with proceeds through the intermediate:[Main 2016]
Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure and temperature are connected through a narrow tube of negligible volume as shown in the figure below. The temperatur
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:[Main 2016]
Aqueous solution of which salt will not contain ions with the electronic configuration ?[Main 10 Apr 2016]
The “N” which does not contribute to the basicity for the compound is :[Main 10 Apr 2016]
The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below : →i →ii The closest rate constant for the overall reaction is:[Main 9 Apr 2016]
The transition metal ions responsible for color in ruby and emerald are,respectively :[Main 10 Apr 2016]
Oxidation of succinate ion produces ethylene and carbon dioxide gases. Onpassing Faraday electricity through an aqueous solution of potassium succinate,the total volume of gases (at both cathode and a
Identify the correct statement :[Main 10 Apr 2016]
The product of the reaction given below is:[Main 2016]
Identify the correct trend given below : (Atomic No.=Ti : 22, Cr : 24 and Mo : 42)[Main 9 Apr 2016]
Which of the following is an example of homoleptic complex ?[Main 10 Apr 2016]
For the reaction, ,∆H° and ∆S° are respectively, and at 298 K.The equilibrium constant for the reaction at 298 K is :[Main 9 Apr 2016]
Which one of the following complexes shows optical isomerism?[Main 2016]
Observation of “Rhumann’s purple” is a confirmatory test for the presence of :[Main 10 Apr 2016]
Identify the incorrect statement[Main 10 Apr 2016]
Consider the following sequence for aspartic acid :The pI (isoelectric point) of aspartic acid is :[Main 9 Apr 2016]
The volume of 0.1N dibasic acid sufficient to neutralize of a base that furnishes mole of in aqueous solution is :[Main 10 Apr 2016]
The distillation technique most suited for separating glycerol from spent-lye in the soap industry is[Main 2016]
At very high pressures, the compressibility factor of one mole of a gas is given by :[Main 9 Apr 2016]
The bond angle is the greatest in the compound :[Main 10 Apr 2016]
Consider the reaction sequence below : is:[Main 10 Apr 2016]
Assertion : Among the carbon allotropes, diamond is an insulator, whereas,graphite is a good conductor of electricity.Reason : Hybridization of carbon in diamond and graphite are and ,respectively.[Ma
The equilibrium constant at 298 K for a reaction is is 100. If the initial concentration of all the four species were 1M each, then equilibrium concentration of D (in mol ) will be:[Main 2016]
Bouveault-Blanc reduction reaction involves :[Main 9 Apr 2016]
Fluorination of an aromatic ring is easily accomplished by treating a diazonium salt with . Which of the following conditions is correct about this reaction ?[Main 10 Apr 2016]
In the Hofmann bromamide degradation reaction, the number of moles of NaOH and used per mole of amine produced are:[Main 2016]
The plot shows the variation of versus temperature for the two reactions. and Identify the correct statement :[Main 9 Apr 2016]
The absolute configuration of [Main 2016]
The pair in which phosphorous atoms have a formal oxidation state of +3 is:[Main 2016]
Which one of the following reagents is not suitable for the elimination reaction ?[Main 10 Apr 2016]
The solubility of in water at 300 K and 500 torr partial pressure is . The solubility (in ) at 750 torr partial pressure is :[Main 9 Apr 2016]
The non-metal that does not exhibit positive oxidation state is :[Main 9 Apr 2016]
Initially, the root mean square (rms) velocity of molecules at certain temperature is u.If this temperature is doubled and all the nitrogen molecules dissociate into nitrogen atoms, then the new rms v
The group of molecules having identical shape is :[Main 9 Apr 2016]
The correct statement about the synthesis of erythritol used in the preparation of PETN is :[Main 10 Apr 2016]
An aqueous solution of a salt at certain temperature has a van’t Hoff factor of 2.The degree of dissociation for this solution of the salt is :[Main 10 Apr 2016]
2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields (a) (b) (c) [Main 2016]
The gas evolved on heating in methanol is :[Main 9 Apr 2016]
Which intermolecular force is most responsible in allowing xenon gas to liquefy ?[Main 9 Apr 2016]
Which of the following compounds is metallic and ferromagnetic ?[Main 2016]
Galvanization is applying a coating of :[Main 2016]
The test to distinguish primary, secondary and tertiary amines is :[Main 9 Apr 2016]
The heats of combustion of carbon and carbon monoxide are –393.5 and ,respectively. The heat of formation (in kJ) of carbon monoxide per mole is :[Main 2016]
An organic compound contains C, H and S. The minimum molecular weight of the compound containing 8% sulphur is :(atomic weight of S=32 amu)[Main 9 Apr 2016]
The rate law for the reaction below is given by the expression ProductIf the concentration of B is increased from to mole, keeping the value of A at0.1 mole, the rate constant will be :[Main 10 Apr 20
Bromination of cyclohexene under conditions given below yields :[Main 10 Apr 2016]
The following statements concern elements in the periodic table. Which of the following is true ?[Main 10 Apr 2016]
Which one of the following species is stable in aqueous solution ?[Main 9 Apr 2016]
The total number of orbitals associated with the principal quantum number 5 is :[Main 9 Apr 2016]
The pair having the same magnetic moment is :[At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27][Main 2016]
Decomposition of follows a first order reaction. In fifty minutes the concentration of decreases from 0.5 to 0.125 M in one such decomposition. When the concentration of reaches 0.05 M, the rate of fo
Which one of the following complexes will consume more equivalents of aqueous solution of ?[Main 9 Apr 2016]
18 g glucose is added 178.2g water . The vapour pressure of water (in torr) for this aqueous solution is :[Main 2016]
A solid XY kept in an evacuated sealed container undergoes decomposition to form a mixture of gases X and Y at temperature T. The equilibrium pressure is 10 bar in this vessel. for this reaction is :[
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% by volume for complete combustion. After combustion the gases occupy 330 mL. Assuming that the water formed is in
A reaction at 1 bar is non-spontaneous at low temperature but becomes spontaneous at high temperature. Identify the correct statement about the reaction among the following :[Main 9 Apr 2016]
The hydrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :[Main 9 Apr 2016]
Thiol group is present in :[Main 2016]
A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference esu. If e and m are charge and mass of an electron, respectively, then the value of (w
The area (in sq. units) of the region described by is :[Main 9 Apr 2016]
If the mean deviation of the numbers from their mean is 255, then a value of d is :[Main 9 Apr 2016]
Let . Then is an increasing function in the interval :[Main 10 Apr 2016]
The solution of the differential equation ,where and , is given by:[Main 10 Apr 2016]
If the equation and have a common root different from , then is equal to :[Main 9 Apr 2016]
The area (in sq. units) of the region and is :[Main 2016]
The integral is equal to:(where C is a constant of integration.)[Main 10 Apr 2016]
If the standard deviation of the numbers 2, 3, a and 11 is 3.5, then which of the following is true?[Main 2016]
If A and B are any two events such that and , then the conditional probability, ,where A9 denotes the complement of A, isequal to :[Main 9 Apr 2016]
The number of distinct real values of λ for which the lines and are coplanar is :[Main 10 Apr 2016]
The sum of all real values of x satisfying the equation is[Main 2016]
If the line, lies in plane lx + my - z = 9,then is equal to[Main 2016]
If the function is differentiable at , then is equal to:[Main 9 Apr 2016]
The value of the integral denotes the greatest integer less than or equal to x, is :[Main 10 Apr 2016]
For , if is a differentiable function such that , then equals :(where C is a constant.)[Main 10 Apr 2016]
Let then log p is equal to[Main 2016]
If f(x) is a differentiable function in the interval such that and , for each then is equal to :[Main 9 Apr 2016]
If x is a solution of the equation, , then is equal to :[Main 10 Apr 2016]
If the tangent at a point P, with parameter t, on the curve meets the curve again at a point Q, then the coordinates of Q are :[Main 9 Apr 2016]
An experiment succeeds twice as often as it fails. The probability of at least 5 successes in the six trials of this experimentis :[Main 10 Apr 2016]
The Integral [Main 2016]
The system of linear equations has a non- trivial solution for :[Main 2016]
The sum is equal to:[Main 10 Apr 2016]
If and A adj ,then is equal to[Main 2016]
The value of is equal to :[Main 9 Apr 2016]
If where k is a constant of integration, then equals :[Main 9 Apr 2016]
If , then 'a' is equal to[Main 9 Apr 2016]
The mean of 5 observations is 5 and their variance is 124. If three of the observations are 1, 2 and 6 ; then the mean deviation from the mean of the data is :[Main 10 Apr 2016]
Let and be two sets Then :[Main 10 Apr 2016]
The minimum distance of a point on the curve from the origin is :[Main 9 Apr 2016]
If all the words (with or without meaning) having five letters, formed using the letters of the word SMALL and arranged as in a dictionary; then the position of the word SMALL is:[Main 2016]
is:[Main 10 Apr 2016]
If and , then is[Main 9 Apr 2016]
For let and Then the value of is equal to :[Main 9 Apr 2016]
ABC is a triangle in a plane with vertices and . If the median through A is equally inclined to the coordinate axes, then the value of is :[Main 10 Apr 2016]
If a curve passes through the point and satisfies the differential equation, ,then is equal to :[Main 2016]
If , then is equal to:[Main 9 Apr 2016]
Consider .A normal to at also passes through the point:[Main 2016]
A wire of length 2 units is cut into two parts which are bent respectively to form a square of side = x units and a circle of radius = r units. If the sum of the areas of the square and the circle so
For , and , then:[Main 2016]
A value of θ for which is purely imaginary, is:[Main 2016]
The distance of the point from the plane measured along the line is:[Main 2016]
The distance of the point from the plane passing through the point and perpendicular to the planes and , is :[Main 9 Apr 2016]
If and ;then S;[Main 2016]
Let A be a 3×3 matrix such that Statement - I : Statement - II : The polynomial can be reduced to Then:[Main 10 Apr 2016]
If , then the determinant of the matrix is:[Main 10 Apr 2016]
The shortest distance between the lines and lies in the interval:[Main 9 Apr 2016]
is equal to:[Main 2016]
Let two fair six-faced dice A and B be thrown simultaneously. If is the event that die A shows up four, is the event that die B shows up two and is the event that the sum of numbers on both dice is od
If the four letter words (need not be meaningful ) are to be formed using the letters from the word“MEDITERRANEAN” such that the first letter is R and the fourth letter is E, then the total number of
If , then n satisfies the equation :[Main 10 Apr 2016]
A hemispherical glass body of radius 10 cm and refractive index 1.5 is silveredon its curved surface. A small air bubble is 6 cm below the flat surface inside it along the axis. The position of the im
A 50 Ω resistance is connected to a battery of 5 V. A galvanometer of resistance100 Ω is to be used as an ammeter to measure current through the resistance, for this a resistance is connected to the g
A cubical block of side 30 cm is moving with velocity on a smooth horizontal surface. The surface has a bump at a point O as shown in figure. The angular velocity (in rad/s) of the block immediately a
An arc lamp requires a direct current of 10 A and 80 V to function. If it is connected to a 220 V (rms), 50Hz AC supply, the series inductor needed for it to work is close to :[Main 2016]
A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75°. One of the fields has a magnitude of 15 mT. The dipole attains stable equilibrium at an angl
A photoelectric surface is illuminated successively by monochromatic light of wavelengths and . If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the fi
Concrete mixture is made by mixing cement, stone and sand in a rotating cylindrical drum. If the drum rotates too fast, the ingredients remain stuck to the wall of the drum and proper mixing of ingred
In the circuit shown, the resistance r is a variable resistance. If for , the heat generation in r is maximum then the value of f is :[Main 9 Apr 2016]
An astronaut of mass is working on a satellite orbiting the earth at a distance from the earth’s surface. The radius of the earth is , while its mass is . The gravitational pull on the astronaut is[Ma
Arrange the following electromagnetic radiations per quantum in the order of increasing energy :A : Blue light B : Yellow lightC : X -ray D : Radiowave[Main 2016]
A uniformly tapering conical wire is made from a material of Young’s modulus Y and has a normal, unextended length L. The radii, at the upper and lower ends of this conical wire, have values R and 3R,
The potential (in volts) of a charge distribution is given by for for V(z) does not depend on x and y. If this potential is generated by a constant charge per unit volume (in units ) which is spread o
Figure shows a network of capacitors where the numbers indicates capacitances in micro Farad. The value of capacitance C if the equivalent capacitance between point A and B is to be [Main 10 Apr 2016]
A galvanometer having a coil resistance of 100 Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammet
A neutron moving with a speed makes a head on collision with a stationary hydrogen atom in ground state. The minimum kinetic energy of the neutron for which inelastic collision will take place is :[Ma
Two engines pass each other moving in opposite directions with uniform speed of 30 m/s. One of them is blowing a whistle of frequency 540 Hz. Calculate the frequency heard by driver of second engine b
In an engine the piston undergoes vertical simple harmonic motion with amplitude 7 cm. A washer rests on top of the piston and moves with it. The motor speed is slowly increased. The frequency of the
A conducting metal circular-wire-loop of radius r is placed perpendicular to amagnetic field which varies with time as where and are constants, at time .If the resistance of the loop is R then the hea
A toy-car, blowing its horn, is moving with a steady speed of 5 m/s, away from a wall.An observer, towards whom the toy car is moving, is able to hear 5 beats per second.If the velocity of sound in ai
A, B, C and D are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD=C ln(BD) holds true. Then which of the combination is
Let ABC be a triangle whose circumcentre is at P. If the position vectors of A, B, C and P are and respectively, then the position vector of the orthocentre of this triangle, is :[Main 10 Apr 2016]
Two particles are performing simple harmonic motion in a straight line about the same equilibrium point. The amplitude and time period for both particles are same and equal to A and T, respectively. A
A screw gauge with a pitch of 0.5 mm and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of Aluminium. Before starting the measurement, it is found that when the tw
A galvanometer has a division scale.Battery has no internal resistance. It isfound that there is deflection of divisions when . Deflection becomes 20 divisions when resistance taken fromresistance box
To get an output of 1 from the circuit shown in figure the input must be :[Main 10 Apr 2016]
A realistic graph depicting the variation of the reciprocal of input resistance in an input characteristics measurement in a common emitter transistor configuration is :[Main 10 Apr 2016]
For a common emitter configuration, if α and β have their usual meanings, the incorrect relationship between α and β is :[Main 2016]
Figure shows elliptical path abcd of a planet around the sun S such that the area of triangle csa is he area of the ellipse. (See figure) With db as the semimajor axis, and ca as the semiminor axis. I
A satellite is revolving in a circular orbit at a height ‘h’ from the earth’s surface (radius of earth R; h < < R).The minimum increase in its orbital velocity required, so that the satellite could es
Consider a water jar of radius R that has water filled up to height H and is kept on a stand of height h (see figure). Through a hole of radius r (r < < R) at its bottom, the water leaks out and the s
When photons of wavelength are incident on an isolated sphere, thecorresponding stopping potential is found to be V. When photons of wavelength are used, the corresponding stopping potential was thric
Consider a thin metallic sheet perpendicular to the plane of the paper moving with speed ‘υ’ in a uniform magnetic field B going into the plane of the paper (See figure). If charge densities and are i
The temperature dependence of resistances of Cu and undoped Si in the temperature range 300 – 400 K, is best described by :[Main 2016]
A thin 1 m long rod has a radius of .A force of is applied at one end to determine its Young’s modulus. Assume that the force is exactly known. If the least count in the measurement of all lengths is
Microwave oven acts on the principle of :[Main 9 Apr 2016]
To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are :[Main 10 Apr 2016]
A point particle of mass m, moves along the uniformly rough track PQR as shown in the figure. The coefficient of friction, between the particle and the rough track equals μ.The particle is released, f
Two stars are 10 light years away from the earth. They are seen through a telescope of objective diameter 30 cm. The wavelength of light is 600 nm. To see the stars just resolved by the telescope, the
Two identical wires A and B, each of length ,carry the same current I.Wire A is bent into a circle of radius R and wire B is bent to form a square of side ‘a’. If and are the values of magnetic field
A roller is made by joining together two cones at their vertices O. It is kept on two rails AB and CD which are placed asymmetrically (see figure), with its axis perpendicular to CD and its centre O a
A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the 4 μF and 9 μF capacit
Three capacitors each of 4 µF are to be connected in such a way that the effective capacitance is 6 µF. This can be done by connecting them :[Main 9 Apr 2016]
A particle of mass m is moving along the side of a square of side ‘a’, with a uniform speed v in the x-y plane as shown in the figure :Which of the following statements is false for the angular moment
Which of the following option correctly describes the variation of the speed v and acceleration ‘a’ of a point mass falling vertically in a viscous medium that applies a force where ‘k’ is a constant,
200 g water is heated from 40°C to 60°C.Ignoring the slight expansion of water, the change in its internal energy is close to(Given specific heat of water=4184 J/kg/K) :[Main 9 Apr 2016]
A Carnot freezer takes heat from water at 0°C inside it and rejects it to the room at a temperature of 27°C. The latent heat of iceis . If 5 kg of water at 0°C is converted into ice at 0°C by the free
The box of pin hole camera, of length L, has a hole of radius a. It is assumed that when the hole is illuminated by a parallel beam of light of wavelength the spread of the spot (obtained on the oppos
Velocity-time graph for a body of mass 10 kg is shown in figure. Work-done on the body in first two seconds of the motionis :[Main 10 Apr 2016]
A rocket is fired vertically from the earth with an acceleration of 2g, where g is the gravitational acceleration. On an inclined plane inside the rocket, making an angle θ with the horizontal, a poin
A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is : [Main 20
A simple pendulum made of a bob of mass m and a metallic wire of negligible mass has time period 2s at . If the temperature of the wire is increased and the corresponding change in its time period is
A particle of mass is acted upon by a force given by the empirical law .If this law is to be tested experimentally by observing the motion starting from rest, the best way is to plot :[Main 10 Apr 201
A car of weight W is on an inclined road that rises by 100 m over a distance of 1 km and applies a constant frictional force on the car. While moving uphill on the road at a speed of , the car needs p
A pendulum clock loses 12 s a day if the temperature is 40°C and gains 4 s a day if the temperature is 20°C The temperature at which the clock will show correct time, and the co-efficient of linear ex
The ratio of work done by an ideal monoatomic gas to the heat supplied to itin an isobaric process is :[Main 9 Apr 2016]
A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will
A hydrogen atom makes a transition from to and emits a photon. This photon strikes a doubly ionized lithium atom in excited state and completely removes the orbiting electron. The least quantum number
A convex lens, of focal length 30 cm, a concave lens of focal length 120 cm, and a plane mirror are arranged as shown. Foran object kept at a distance of 60 cm from the convex lens, the final image, f
An unknown transistor needs to be identified as a or type. A multimeter, with +ve and −ve terminals,is used to measure resistance between different terminals of transistor. If terminal 2 is the base o
In the figure shown ABC is a uniform wire.If centre of mass of wire lies vertically below point A, then is close to :[Main 10 Apr 2016]
Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes, respectively. Initially, thesamples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B
The ratio (R) of output resistance , and the input resistance in measurements of input and output characteristics of a transistor is typically in the range :[Main 10 Apr 2016]
In a triangle ABC, right angled at the vertex A, if the position vectors of A, B and C are respectively and then the point lies on a line[Main 9 Apr 2016]
The region between two concentric spheres of radii ‘a’ and ‘b’, respectively (see figure), has volume charge density A where A is a constant and r is the distance from the centre. At the centre of the
The resistance of an electrical toaster has a temperature dependence given by in its range of operation.At and at .The toaster is connected to a voltage source at 200 V and its temperature is raised a
An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears :[Main 2016]
An experiment is performed to determine the I - V characteristics of a Zener diode,which has a protective resistance of , and a maximum power of dissipation rating of 1 W. The minimum voltage range of
A particle of mass M is moving in a circle of fixed radius R in such a way that its centripetal acceleration at time t is given by where n is a constant. The power delivered to the particle by the for
If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :[Main 2016]
A series LR circuit is connected to a voltage source with .After very large time, current behaves as :[Main 9 Apr 2016]
Which of the following shows the correct relationship between the pressure ‘P’ and density of an ideal gas at constant temperature ?[Main 10 Apr 2016]
‘n’ moles of an ideal gas undergoes a process A → B a shown in the figure. The maximum temperature of the gas during the process will be : [Main 2016]
To know the resistance G of a galvanometer by half deflection method, a battery of emf and resistance R is used to deflect the galvanometer by angle θ. If a shunt of resistance S is needed to get half
Identify the semiconductor devices whose characteristics are given below, in the order (a), (b), (c), (d) :[Main 2016]
In Young’s double slit experiment, the distance between slits and the screen is 1.0 m and monochromatic light of 600 nm is being used. A person standing near the slits is looking at the fringe pattern
A particle performs simple harmonic motion with amplitude A. Its speed is trebled at the instant that it is at a distance from equilibrium position. The new amplitude of the motion is :[Main 2016]
A student measures the time period of 100 oscillations of a simple pendulum four times. The data set is 90s,91s, 95s and 92s. If the minimum division in the measuring clock is 1s, then the reported me
Within a spherical charge distribution of charge density ,N equipotential surfaces of potential , are drawn and have increasing radii , respectively. If the difference in the radii of the surfaces is
An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity C remains constant. If during this process the relation of pressure P and volume V is given by = constant, th
The truth table given below represents :ABY000011101111[Main 9 Apr 2016]
A fighter plane of length 20 m, wing span (distance from tip of one wing to the tip of the other wing) of 15 m and height 5 m is flying towards east over Delhi. Its speed is .The earth's magnetic fiel
A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now :[Main 2016]
Hysteresis loops for two magnetic materials A and B are given below : These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to us
In the following ‘I’ refers to current and other symbols have their usual meaning. Choose the option that corresponds to the dimensions of electrical conductivity :[Main 9 Apr 2016]
Radiation of wavelength , is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to the speed of the fastest emitted electron will be :[Main 2016]
To find the focal length of a convex mirror, a student records the following data :Object PinConvex LensConvex MirrorImage Pin22.2 cm32.2 cm45.8 cm71.2 cmThe focal length of the convex lens is and tha
Consider an electromagnetic wave propagating in vacuum. Choose the correct statement :[Main 10 Apr 2016]
A bottle has an opening of radius a and length b. A cork of length b and radius(a+∆a) where (∆a < < a) is compressed to fit into the opening completely (See figure).If the bulk modulus of cork is B an
In an experiment for determination of refractive index of glass of a prism by i – δ, plot, it was found that a ray incident at angle 35°, suffers a deviation of 40° and that it emerges at angle 79°. I