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	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
2	Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as	A. ON switch B. off switch C. function switch D. none of these
3	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
4	The idea of quantization of energy was proposed by:	A. Einstein B. Max.Planck C. Maxwell D. Bohr
5	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
6	A black body is	A. an ideal absorber B. an ideal radiator C. both of them D. none of them
7	The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as	A. classical mechanics B. Newtonian mechanics C. quantum mechanics D. statistical mechanics
8	When a position comes close to an electron they annihilate into photons such that	A. each photon has energy 0.51 Me v B. each photon has energy 1.02 Me v C. each photon has energy 0.25 Me v D. none of these
9	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
10	The year when A.H. compton was awarded Nobel Prize is:	A. 1923 B. 1927 C. 1931 D. 1935

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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

Wave nature of particle was proposed by

The value of threshold frequency for different metals is

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

The special theory of relativity is based on:

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

Davision and Germer performed experiment to verify

The positron was discovered by:

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

Which of the following is not an example of intertial frame

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

A particle having mass and charge equal to that of an electron is called:

The special theory of relativity is based on the

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

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

A photon is considered to have

de-Broglies hypthesis was experimentally verified by

The energy of a photon is represented by

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

When a platinum wire is heated, it appears white at

The idea of quantization of energy was proposed by:

Momentum is a parameter associated with

The length contraction happens only

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

S.I. unit of planks constant is

Compton was awarded Nobel prize in physics in

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

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

the symbol to be used in relativity problems denotes:

The photon of radio-waves has energy of about

Photoelectric effect takes place with a photon of:

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Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

ECAT Physics Chapter 19 Important MCQ's

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