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	the symbol to be used in relativity problems denotes:	A. Dilated time B. Proper time C. Life time D. Half time
2	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}
3	The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of	A. 2 cm/s B. 20 cm/s C. 200 cm/s D. 2000 cm/s
4	Compton was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
5	An intertial frame of reference is a frame of reference which is	A. at rest B. moving with uniform velocity C. either at rest or moving with uniform velocity D. none of these
6	The general theory of relativity treats problems involving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
7	The unit of work function is:	A. Joule B. Electron volt C. That of threshold frequency D. Both (A) and (B)
8	In the compton's effect, it is found that the wavelength of incident x-rays is	A. greater than the wavelength of scattered x-rays B. equal to the wavelength of scattered x-rays C. less than the wavelength of scattered x-rays D. any one of these
9	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
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

According to the special theory of relativity, a moving clock

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

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

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

Momentum is a parameter associated with

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

Practically the quantity v/c is always:

The special theory of relativity treats problems invoving

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

The energy of the 4th orbit in hydrogen atom is

The photon of radio-waves has energy of about

The existence of position was predicted by Dirace in

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

The length contraction happens only

The value of threshold frequency for different metals is

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

G.P. Thomson observer experimentally that electrons and neutrons possess

The special theory of relatively treats the problems involving:

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

There is no way to detect:

0.1 kg mass will be equivalent to the energy

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

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

A black body is

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

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

The concept of direction is purely:

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

The general theory of relativity treats problems involving

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

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ECAT Physics Chapter 19 Important MCQ's

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