ECAT Pre General Science Chapter 19 online mcq test with answers for Physics chapter 19 (Dawn of Modern Physics)

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ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:	A. Lummer B. Planck C. Pringsheim D. Both (A ) and (B)
2	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)
3	Pair production is the phenomenon in which	A. matter is converted into energy B. energy is converted into matter C. light is converted into electrical energy D. electrical energy is converted into light
4	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
5	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
6	When low energy photon interact with a metal,which of the following effect is likely to be taken place	A. pair production B. photoelectric C. Compton effect D. None of these
7	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
8	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates
9	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
10	Davision and Germer performed experiment to verify	A. de-Brogile hypothesis B. theory of relativity C. Newton's law of gravitation D. Mass-energy relation

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ECAT Pre General Science Physics Chapter 19 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

The special theory of relativity treats problems invoving

Momentum is a parameter associated with

When platinum wire is heated, it appears cherry red at

A photon is considered to have

If a material object moves with the speed of light 'C' its mass becomes

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Wave nature of particle was proposed by

When a platinum wire is heated, it appears yellow at

A black body is

The mass of an object will be doubled at speed

S.I. unit of planks constant is

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

When a position comes close to an electron they annihilate into photons such that

Compton was awarded Nobel prize in physics in

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Photoelectric effect takes place with a photon of:

The existence of position was predicted by Dirace in

An intertial frame of reference is a frame of reference which is

The idea of quantization of energy was proposed by:

Compton studied the scattering of x-rays by loosely bound electrons from:

The energy of a photon is represented by

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

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

Which of the following phenomenon proves the particle nature of light

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

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

Victor de-Brogile received the Nobel prize in physics in

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

The concept of direction and position are purely

A non-inertial frame of reference is one, in which

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ECAT Physics Chapter 19 Important MCQ's

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When platinum wire is heated, then at the temperature of 500 ^oC, it becomes: