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

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

Question # 2

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

Question # 3

Max Planck received the Nobel Prize for his discovery of energy quants in:

Question # 4

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

Question # 5

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

Question # 6

According to the special theory of relativity, time is

Question # 7

the dilation of time applies to the timing processes which are:

Question # 8

Newton's law of motion do not hold in

Question # 9

A black body is

Question # 10

The energy of photon 'E' is proported to

Question # 11

Intensity of light determines the:

Question # 12

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

Question # 13

Wave nature of particle was proposed by

Question # 14

The general theory of relativity treats problems involving

Question # 15

Practically the quantity v/c is always:

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the
A. number of photoelectrons
B. size of the photoelectrons
C. charge on photoelectrons
D. K.E of photoelectrons
2 Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of
A. photoelectric effect
B. pair production
C. Compton effect
D. uncertainty principle
3 In process of annihilation of matter, the two photons produced move in opposite direction to converse
A. momentum
B. charge
C. energy
D. mass
4 0.1 kg mass will be equivalent to the energy
A. 9 x 1015J
B. 5 x 108J
C. 6 x 1016J
D. 9 x 10-16J
5 de-Broglies hypthesis was experimentally verified by
A. Maxwell
B. Compton
C. Einstein
D. Davison and Germer
6 A photon is considered to have
A. Momentum
B. Energy
C. Wavelength
D. All of the above
7 There is no way to detect:
A. Absolute uniform motion
B. Accelerated motion
C. State rest
D. State of motion
8 Electromagnetic -radiation means:
A. Photons
B. protons
C. Electrons
D. Mesons
9 The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is
A. 100 ev
B. 106e v
C. 103e v
D. 1.0 e v
10 If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:
A. Newton
B. Joule
C. Joule-Sec
D. Joule-s-1

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