List of top Physics Questions

A current of \( \frac{10}{\pi} \) A is maintained in a circular loop of radius 14 cm. The value of dipole moment associated with the loop is:
Consider the following statements about light:
A. photoelectric effect exhibits wave nature of light.
B. Compton effect exhibits wave nature of light.
C. photoelectric effect exhibits particle nature of light.
D. Compton effect exhibits particle nature of light.
Choose the CORRECT answer from the options given below:
The gas constant is:
Degree of degeneracy will be large when:
Wavelength of X-rays having the largest penetrating power is:
According to the Dulong and Petit's law, the atomic heat of an element at constant volume:

Match the LIST-I with LIST-II

LIST-ILIST-II
A.Compton EffectIV.Scattering
B.Colors in thin filmII.Interference
C.Double RefractionIII.Polarization
D.Bragg's EquationI.Diffraction


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If an electromagnetic wave is totally reflected, the radiation pressure in terms of average Poynting vector S\(_{av}\) is:
Inside a uniformly charged spherical shell, the value of the electric field at distance r from the center is:
Which of the following statements are correct:
A. Specific heat of saturated water vapour at 100\(^{\circ}\)C is negative.
B. There is only one triple point of a substance.
C. Boiling point of every liquid rises with increase in pressure.
D. Latent heat can not become zero.
Choose the CORRECT answer from the options given below:
Specific heat of saturated water vapour at 100\(^{\circ}\)C is.
For a system of particles, if the external net force acting on the system is zero, the system's center of mass is:
The resolving power of a grating:
A. increases with increase in total number of lines ruled on grating.
B. increases with increase in total width of grating.
C. increases with increasing the order of spectrum as in Echelon grating.
D. increases with decreasing the order of spectrum as in Echelon grating.
Choose the CORRECT answer from the options given below:
Subtract (29.A)\(_{16}\) from (4F.B)\(_{16}\)
Quantum statistics changes into classical statistics if: (Symbols have their usual meaning)
The place at which plane of vibration of Foucault's pendulum does not rotate at all, is:
A conducting sphere of radius R carries a total charge Q. The electric field at a distance r>R from the center is:
The gravitational field at a point in space is:
When light ray refracts on entering from one medium to another medium of different refractive indices, it follows:
The first maxima for Bragg's diffraction pattern by a crystal is observed at 30\(^{\circ}\) when X-rays wavelength of 0.32 nm are used. The distance between the atomic planes is:
The stopping potential for a fast moving photo-electron is independent of:

Match the LIST-I with LIST-II

LIST-I (Logic Gates)LIST-II (Expressions)
A.EX-ORI.\( A\bar{B} + \bar{A}B \)
B.NANDII.\( A + B \)
C.ORIII.\( AB \)
D.EX-NORIV.\( \bar{A}\bar{B} + AB \)

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Match List-I with List-II for the index of refraction for yellow light of sodium (589 nm)

LIST-I (Materials)LIST-II (Refractive Indices)
A.IceI.1.309
B.Rock salt (NaCl)II.1.460
C.CCl₄III.1.544
D.DiamondIV.2.417


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Match the LIST-I with LIST-II

LIST-I (Type of decay in Radioactivity)LIST-II (Reason for stability)
A.Alpha decayIII.Nucleus is mostly heavier than Pb (Z=82)
B.Beta negative decayIV.Nucleus has too many neutrons relative to the number of protons
C.Gamma decayI.Nucleus has excess energy in an excited state
D.Positron EmissionII.Nucleus has too many protons relative to the number of neutrons


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A 1500 kg car traveling east with a speed of 25 m/s collides at an intersection with a 2500 kg van traveling north at a speed of 20 m/s. The direction of wreckage after collision, assuming that the vehicles undergo a perfectly inelastic collision is: