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	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
2	According to the special theory of relativity	A. mass and energy are same entities B. mass and energy are same entities but interconverible C. mass and energy are different entities but interconverible D. mass and energy are different entities but non-interconveritble
3	The positron was discovered by:	A. In cosmic radiation B. In 1932 C. By Carl Anderson D. All above
4	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
5	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass
6	Strictly speaking, the earth is:	A. An accelerated frame of reference B. A non-inertial frame of reference C. An inertial frame of reference D. ^{A non-accelerated frame of reference}
7	the dilation of time applies to the timing processes which are:	A. Physical B. Chemical C. Biological D. All of these
8	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
9	Compton derived an expression to find compton shift by applying to the process, the law of conservation of:	A. Energy only B. Momentum only C. Mass only D. Charge only
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

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

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

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

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

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

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

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

When platinum wire is heated, it appears cherry red at

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

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

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

According to the de-Brogile relation, an object of large mass and ordinary speed has

de-Broglies hypthesis was experimentally verified by

The Einstein's changes in length, mass and time are not observed in common life because

The idea of quantization of energy was proposed by:

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

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

The energy of photon 'E' is proported to

The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be

According to the special theory of relativity

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

The general theory of relativity treats problems involving

From the theory of relativity, momentum p of the photon is related to energy as

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

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

When a platinum wire is heated, it appears yellow at

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

the symbol to be used in relativity problems denotes:

The year when A.H. compton was awarded Nobel Prize is:

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ECAT Physics Chapter 19 Important MCQ's

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The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be