ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

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

Try The 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

Newton's law of motion do not hold in

Question # 2

The general theory of relativity treats problems involving

Question # 3

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

Question # 4

The special theory of relativity treats problems invoving

Question # 5

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

Question # 6

0.1 kg mass will be equivalent to the energy

Question # 7

Photoelectric effect takes place with a photon of:

Question # 8

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

Question # 9

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

Question # 10

An inertial frame is that frame in which

Question # 11

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

Question # 12

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

Question # 13

When a platinum wire is heated, it appears dull red at about

Question # 14

According to the special theory of relativity, a moving clock

Question # 15

Absolute motion cannot be detected

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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 A high temperature, the proportion of shorter wavelengths radiation, emitted by the body
A. decreases
B. first increases then decreases
C. increases
D. any one of them
3 Absolute motion cannot be detected
A. in its own frame of references
B. in a different frame of references
C. both in its frame and different frame of references
D. none of these
4 The energy of a photon is represented by
A. h/c2
B. h/T
C. hc2
D. hf/c2
5 According to the Max plank, energy is redialed or absorbed in
A. discrete packets
B. continuous waves
C. either of them
D. none of these
6 The special theory of relativity is based on:
A. Four postulates
B. Three postulates
C. Two postulates
D. One postulate
7 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
8 Max Planck received the Nobel Prize for his discovery of energy quants in:
A. 1718 AD
B. 1918 AH
C. 1818 AD
D. 1918 AD
9 The special theory of relativity is based on the
A. one postulate
B. two postulates
C. three postulates
D. four postulates
10 In process of annihilation of matter, the two photons produced move in opposite direction to converse
A. momentum
B. charge
C. energy
D. mass

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