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

According to the special theory of relativity, a moving clock

Question # 2

Which of the following phenomenon proves the particle nature of light

Question # 3

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

Question # 4

The special theory of relatively treats the problems involving:

Question # 5

In the compton's effect, it is found that the wavelength of incident x-rays is

Question # 6

An inertial frame is that frame in which

Question # 7

Converse of pair production is known as

Question # 8

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

Question # 9

When the atomic particle are moving with velocities approaching that of light:

Question # 10

The nature of radiations emitted by a hot body depends upon its:

Question # 11

When a platinum wire is heated, it appears yellow at

Question # 12

According to the de-Brogile relation, an object of large mass and ordinary speed has

Question # 13

Which of the following is not an example of intertial frame

Question # 14

When a platinum wire is heated, it appears orange red at

Question # 15

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 When a platinum wire is heated, it appears dull red at about
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C
2 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
3 Momentum is a parameter associated with
A. wave motion
B. particle motion
C. neither wave nor particle motion
D. none of these
4 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time
5 The general theory of relativity treats problems involving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
6 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
7 The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of
A. 2 cm/s
B. 20 cm/s
C. 200 cm/s
D. 2000 cm/s
8 de-Broglies hypthesis was experimentally verified by
A. Maxwell
B. Compton
C. Einstein
D. Davison and Germer
9 There is no way to detect:
A. Absolute uniform motion
B. Accelerated motion
C. State rest
D. State of motion
10 Practically the quantity v/c is always:
A. less than one
B. Equal to one
C. Greater then one
D. all of these

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