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	S.I. unit of planks constant is	A. J-s^-1 B. J.s C. J.s^-2 D. J.s²
2	When the atomic particle are moving with velocities approaching that of light:	A. Newton's laws become valid B. Relativistic effects become prominent C. Botha(A) and (B) are valid D. Neither (A)nor (B)
3	The emission of electrons from a metal surface when exposed to light of suitable frequency is called the	A. pair production B. Compton effect C. photoelectric effect D. relativity
4	As the light shines on the metal surface, the electrons are ejected	A. slowly B. instantaneously C. either of these D. none of these
5	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
6	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
7	Pair production is the phenomenon in which	A. matter is converted into energy B. energy is converted into matter C. light is converted into electrical energy D. electrical energy is converted into light
8	The year when A.H. compton was awarded Nobel Prize is:	A. 1923 B. 1927 C. 1931 D. 1935
9	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
10	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion

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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 dilation of time applies to the timing processes which are:

The concept of direction and position are purely

Victor de-Brogile received the Nobel prize in physics in

The inside cavity of the black body is

The positron was discovered by:

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

Which of the following is not an example of intertial frame

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

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

Compton was awarded Nobel prize in physics in

The idea of quantization of energy was proposed by:

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

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

The length contraction happens only

The special theory of relativity treats problems invoving

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

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

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

the symbol to be used in relativity problems denotes:

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

There is no way to detect:

Momentum is a parameter associated with

In photoelectric effect the energy of ejected electrons depend on

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

According to the special theory of relativity, a moving clock

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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

S.I. unit of planks constant is

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

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

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ECAT Physics Chapter 19 Important MCQ's

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