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 Einstein, with the great increase in the speed of the body the relativistic length of the body	A. Remains constant B. Decreases C. Increases D. Reduces to zero
2	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
3	According to the special theory of relativity, a moving clock	A. runs faster B. runs slower C. neither runs faster nor slower D. all of these
4	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
5	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
6	The energy of the 4th orbit in hydrogen atom is	A. 2.5 ev B. - 3.5 ev C. -0.85 ev D. -13.6 ev
7	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
8	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. larger B. shorter C. equal D. none of these
9	When platinum wire is heated, then at the temperature of 500 ^oC, it becomes:	A. Yellow B. Orange red C. Dull red D. White
10	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

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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

An inertial frame is that frame in which

Wave nature of particle was proposed by

The value of threshold frequency for different metals is

Which of the following phenomenon proves the particle nature of light

When a platinum wire is heated, it appears orange red at

Position was discovered by Carl Anderson in

Practically the quantity v/c is always:

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Compton was awarded Nobel prize in physics in

S.I. unit of planks constant is

As the light shines on the metal surface, the electrons are ejected

Which one of the following physical quantities changes with relativistic speed

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

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

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

The energy of photon 'E' is proported to

Converse of pair production is known as

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 concept of direction is purely:

de-Broglies hypthesis was experimentally verified by

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

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

The photon of radio-waves has energy of about

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

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

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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