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 special theory of relativity treats problems invoving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
2	When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called	A. thermoionic electrons B. free electrons C. photoelectrons D. slow electrons
3	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
4	At the temperature, a body emits radiation which is principally	A. of long wavelengths in the visible region B. of long wavelengths in the invisible infrared region C. of short wavelength in invisible ultraviolet region D. none of these
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 stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is	A. 100 J B. 1.6 x 10^-17J C. 100 eV D. 1.6 x 10^-17eV
7	The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by	A. Max plank B. Newton C. Einstein D. J.J. Thomson
8	The mass of an object will be doubled at speed	A. 1.6 x 10⁸ms^-1 B. 2.6 X 10⁸ms^-1 C. 2.6 x 10⁷ms^-1 D. 2.6 x 10⁹ms^-1
9	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
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

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

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

The existence of position was predicted by Dirace in

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

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

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

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

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

Momentum is a parameter associated with

The length contraction happens only

Davision and Germer performed experiment to verify

The unit of work function is:

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

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

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:

If a material object moves with the speed of light 'C' its mass becomes

According to the special theory of relativity, time is

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

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

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

Compton shift refers to:

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

Compton was awarded Nobel prize in physics in

de-Broglies hypthesis was experimentally verified by

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

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

Electromagnetic radiation or photons interact with matter in

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

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

The concept of direction and position are purely

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ECAT Physics Chapter 19 Important MCQ's

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