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

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

Question # 2

An inertial frame is that frame in which

Question # 3

According to the Max plank, energy is redialed or absorbed in

Question # 4

0.1 kg mass will be equivalent to the energy

Question # 5

The value of the plank's constant 'h' is given by

Question # 6

At the temperature, a body emits radiation which is principally

Question # 7

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

Question # 8

Wien's constant is measured in:

Question # 9

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

Question # 10

The special theory of relatively treats the problems involving:

Question # 11

the symbol to be used in relativity problems denotes:

Question # 12

The concept of direction and position are purely

Question # 13

With the help of 50 K v electron microscope, a resolution of

Question # 14

When a position comes close to an electron they annihilate into

Question # 15

When a platinum wire is heated, it appears white at

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 A particle having mass and charge equal to that of an electron is called:
A. Proton
B. Positron
C. Pion
D. Pi-meson
2 Wave nature of particle was proposed by
A. Einstein
B. Plank
C. De-Brogile
D. Max well
3 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
4 When platinum wire is heated, it appears cherry red at
A. 1600°C
B. 900°C
C. 1100°C
D. 1300°C
5 The energy of photon 'E' is proported to
A. The magnetic field H
B. The electric field E
C. Both the electric and magnetic field H and E
D. Frequency
6 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
7 There is no way to detect:
A. Absolute uniform motion
B. Accelerated motion
C. State rest
D. State of motion
8 Momentum is a parameter associated with
A. wave motion
B. particle motion
C. neither wave nor particle motion
D. none of these
9 An inertial frame is that frame in which
A. a>0
B. a=0
C. a<0
D. none of these
10 According to the de-Brogile relation, an object of large mass and ordinary speed has
A. very small wavelength
B. very large wavelength
C. very small frequency
D. all of these

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