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	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
2	The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:	A. Lummer B. Planck C. Pringsheim D. Both (A ) and (B)
3	An intertial frame of reference is a frame of reference which is	A. at rest B. moving with uniform velocity C. either at rest or moving with uniform velocity D. none of these
4	According to the Max plank, energy is redialed or absorbed in	A. discrete packets B. continuous waves C. either of them D. none of these
5	The general theory of relativity treats problems involving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
6	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
7	When low energy photon interact with a metal,which of the following effect is likely to be taken place	A. pair production B. photoelectric C. Compton effect D. None of these
8	In the compton's effect, it is found that the wavelength of incident x-rays is	A. greater than the wavelength of scattered x-rays B. equal to the wavelength of scattered x-rays C. less than the wavelength of scattered x-rays D. any one of these
9	When a platinum wire is heated, it appears orange red at	A. 500°C B. 900°C C. 1100°C D. 1300°C
10	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

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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

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

de-Broglies hypthesis was experimentally verified by

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

When a platinum wire is heated, it appears orange red at

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

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

Compton shift refers to:

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

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

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

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

Wave nature of particle was proposed by

The idea of quantization of energy was proposed by:

The length contraction happens only

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

According to the special theory of relativity, a moving clock

An inertial frame is that frame in which

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

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

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

When a position comes close to an electron they annihilate into

According to the special theory of relativity, time is

Victor de-Brogile received the Nobel prize in physics in

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

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

The existence of position was predicted by Dirace in

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

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

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

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

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ECAT Physics Chapter 19 Important MCQ's

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