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	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
2	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
3	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
4	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
5	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
6	Max plank received the Nobel Prize in physics for his discovery of energy quanta in	A. 1900 B. 1906 C. 1912 D. 1918
7	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
8	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
9	The positron was discovered by:	A. In cosmic radiation B. In 1932 C. By Carl Anderson D. All above
10	G.P. Thomson observer experimentally that electrons and neutrons possess	A. particle-like properties B. wave-like properties C. neither particle nor wave like properties D. none of these

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

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

Wien's constant is measured in:

The mass of an object will be doubled at speed

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

The photon of radio-waves has energy of about

In order to produce pair production, a photon must have a energy

When a platinum wire is heated, it appears dull red at about

In process of annihilation of matter, the two photons produced move in opposite direction to converse

A photon is considered to have

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

The positron was discovered by:

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

In photoelectric effect the energy of ejected electrons depend on

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

When the atomic particle are moving with velocities approaching that of light:

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

According to the special theory of relativity, a moving clock

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

The special theory of relatively treats the problems involving:

Position was discovered by Carl Anderson in

There is no way to detect:

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

The existence of position was predicted by Dirace in

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

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

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

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

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

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