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 photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
2	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
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	The existence of position was predicted by Dirace in	A. 1920 B. 1925 C. 1930 D. 1928
5	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
6	If a body reaches a speed equal to the speed of light, then its mass will became	A. zero B. very small C. infinity D. none of these
7	The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is	A. 100 ev B. 10⁶e v C. 10³e v D. 1.0 e v
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	In order to produce pair production, a photon must have a energy	A. 0.511 Me v B. 0.256 Me v C. 1.02 Me v D. 0.956 Me v
10	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion 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

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

de-Broglies hypthesis was experimentally verified by

Which of the following phenomenon proves the particle nature of light

In photoelectric effect the energy of ejected electrons depend on

The mass of an object will be doubled at speed

The general theory of relativity treats problems involving

A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is

Electromagnetic radiation or photons interact with matter in

The energy of a photon is represented by

The energy of the 4th orbit in hydrogen atom is

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

Newton's law of motion do not hold in

Photocell is a device which converts

S.I. unit of planks constant is

Converse of pair production is known as

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

Davision and Germer performed experiment to verify

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

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

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

According to the Max plank, energy is redialed or absorbed in

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

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

There is no way to detect:

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

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 value of the Stephen's constant for black body radiations is given by

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

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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