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	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
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	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
4	The nature of radiations emitted by a hot body depends upon its:	A. Metarial B. Temperature C. colour D. Volume
5	Electromagnetic -radiation means:	A. Photons B. protons C. Electrons D. Mesons
6	The energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
7	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
8	An inertial frame is that frame in which	A. a>0 B. a=0 C. a<0 D. none of these
9	In order to produce pair production, a photon must have a energy	A. 0.511 Me v B. 0.256 Me v C. 1.02 Me v D. 0.956 Me v
10	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

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

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

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

A black body is

Photoelectric effect takes place with a photon of:

Intensity of light determines the:

If a body reaches a speed equal to the speed of light, then its mass will became

Due to relative motion of observer and the frame of reference of events, time always:

The value of the Stephen's constant for black body radiations is given by

An inertial frame is that frame in which

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

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

There is no way to detect:

The mass of an object will be doubled at speed

Compton shift refers to:

In photoelectric effect the energy of ejected electrons depend on

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

Absolute motion cannot be detected

Which of the following is not an example of intertial frame

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

The special theory of relativity is based on:

The Stephen-Boltzmann law for the black body radiation is given by

The special theory of relativity is based on the

Wave nature of particle was proposed by

The photoelectric effect, the maximum energy of photoelectrons depends on the

Practically the quantity v/c is always:

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

When a platinum wire is heated, it appears yellow at

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

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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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: