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	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
2	If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:	A. Newton B. Joule C. Joule-Sec D. Joule-s^-1
3	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
4	Compton derived an expression to find compton shift by applying to the process, the law of conservation of:	A. Energy only B. Momentum only C. Mass only D. Charge only
5	If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be	A. 2.120°A B. 0.212°A C. 21.2°A D. 0.14° a
6	The inside cavity of the black body is	A. painted white B. painted silver C. blackened with soot D. painted red
7	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
8	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
9	Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as	A. ON switch B. off switch C. function switch D. none of these
10	The concept of direction is purely:	A. Absolute B. Relative C. Relative to stars always D. Relative to the sun always

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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 platinum wire is heated, it appears dull red at about

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

The positron was discovered by:

Absolute motion cannot be detected

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

An inertial frame is that frame in which

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Photoelectrons are emitted when ultraviolet light falls on:

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

When a position comes close to an electron they annihilate into

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

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

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

Compton shift refers to:

Pair production is the phenomenon in which

the dilation of time applies to the timing processes which are:

When a platinum wire is heated, it appears white at

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

From the theory of relativity, momentum p of the photon is related to energy as

Practically the quantity v/c is always:

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

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

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

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

Victor de-Brogile received the Nobel prize in physics in

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

According to the special theory of relativity

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

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ECAT Physics Chapter 19 Important MCQ's

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