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 concept of direction is purely:	A. Absolute B. Relative C. Relative to stars always D. Relative to the sun always
2	A high temperature, the proportion of shorter wavelengths radiation, emitted by the body	A. decreases B. first increases then decreases C. increases D. any one of them
3	the dilation of time applies to the timing processes which are:	A. Physical B. Chemical C. Biological D. All of these
4	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
5	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
6	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
7	The nature of radiations emitted by a hot body depends upon its:	A. Metarial B. Temperature C. colour D. Volume
8	Which of the following is not an example of intertial frame	A. a body placed on the surface of earth B. a body placed in a car moving with uniform velocity C. a body placed in a car moving with same acceleration D. none of these
9	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
10	0.1 kg mass will be equivalent to the energy	A. 9 x 10¹⁵J B. 5 x 10⁸J C. 6 x 10¹⁶J D. 9 x 10^-16J

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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

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

de-Broglies hypthesis was experimentally verified by

The inside cavity of the black body is

The mass of an object will be doubled at speed

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

A black body is

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

When a platinum wire is heated, it appears white at

The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be

Which of the following is not an example of intertial frame

Intensity of light determines the:

The special theory of relativity is based on the

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

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

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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

Converse of pair production is known as

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

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

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

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

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

Position was discovered by Carl Anderson in

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

The concept of direction is purely:

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

The value of threshold frequency for different metals is

Electromagnetic radiation or photons interact with matter in

When platinum wire is heated, it appears cherry red at

The general theory of relativity treats problems involving

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ECAT Physics Chapter 19 Important MCQ's

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The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be