ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics

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ECAT Physics Chapter 19 Dawn of Modern Physics

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Question # 1

According to the special theory of relativity, time is

Question # 2

The Stephen-Boltzmann law for the black body radiation is given by

Question # 3

G.P. Thomson observer experimentally that electrons and neutrons possess

Question # 4

The special theory of relativity treats problems invoving

Question # 5

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Question # 6

A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is

Question # 7

0.1 kg mass will be equivalent to the energy

Question # 8

Wave nature of particle was proposed by

Question # 9

The general theory of relativity treats problems involving

Question # 10

The special theory of relativity is based on the

Question # 11

Newton's law of motion do not hold in

Question # 12

Compton shift refers to:

Question # 13

The Einstein's changes in length, mass and time are not observed in common life because

Question # 14

Victor de-Brogile received the Nobel prize in physics in

Question # 15

The energy of a photon is represented by

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Compton derived an expression to find compton shift by applying to the process, the law of conservation of:
A. Energy only
B. Momentum only
C. Mass only
D. Charge only
2 The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be
A. 500 m
B. 500 nm
C. 500 km
D. 500 cm
3 If a material object moves with the speed of light 'C' its mass becomes
A. Equal to its rest mass
B. Four times of its rest mass
C. Double of its rest mass
D. Infinite
4 G.P. Thomson observer experimentally that electrons and neutrons possess
A. particle-like properties
B. wave-like properties
C. neither particle nor wave like properties
D. none of these
5 The special theory of relativity treats problems invoving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
6 When the atomic particle are moving with velocities approaching that of light:
A. Newton's laws become valid
B. Relativistic effects become prominent
C. Botha(A) and (B) are valid
D. Neither (A)nor (B)
7 Compton was awarded Nobel prize in physics in
A. 1921
B. 1923
C. 1925
D. 1927
8 Compton shift refers to:
A. Photon
B. Meson
C. Proton
D. Positron
9 The idea of quantization of energy was proposed by:
A. Einstein
B. Max.Planck
C. Maxwell
D. Bohr
10 The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:
A. Wien's constant
B. Stefen's constnat
C. Planck's constant
D. Boltzmann's constant

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