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	When the atomic particle are moving with velocities approaching that of light:	A. Newton's laws become valid B. Relativistic effects become prominent C. Botha(A) and (B) are valid D. Neither (A)nor (B)
2	The nature of radiations emitted by a hot body depends upon its:	A. Metarial B. Temperature C. colour D. Volume
3	With the help of 50 K v electron microscope, a resolution of	A. 0.5 to 1 m to possible B. 1 m to 10 m is possible C. 0.5 to 1 nm is possible D. 1 to 10 nm is possible
4	According to the special theory of relativity	A. mass and energy are same entities B. mass and energy are same entities but interconverible C. mass and energy are different entities but interconverible D. mass and energy are different entities but non-interconveritble
5	When a high energy photon interact with a metal, which of the following effect is most likely to be taken place	A. pair production B. photoelectric effect C. Compton effect D. None of these
6	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
7	When a platinum wire is heated, it appears dull red at about	A. 500°C B. 900°C C. 1100°C D. 1300°C
8	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
9	A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is	A. 1.66 m B. 1.66 x 10^-10m C. 1.66 x 10^-29cm D. 1.66 x 10^-29m
10	The energy of the 4th orbit in hydrogen atom is	A. 2.5 ev B. - 3.5 ev C. -0.85 ev D. -13.6 ev

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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

Absolute motion cannot be detected

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

Victor de-Brogile received the Nobel prize in physics in

At the temperature, a body emits radiation which is principally

The photon of radio-waves has energy of about

Converse of pair production is known as

The special theory of relatively treats the problems involving:

Strictly speaking, the earth is:

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

Which of the following phenomenon proves the particle nature of light

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

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

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

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

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

When a position comes close to an electron they annihilate into

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

An inertial frame is that frame in which

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

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

A black body is

Momentum is a parameter associated with

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

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

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

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

The unit of work function is:

The idea of quantization of energy was proposed by:

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ECAT Physics Chapter 19 Important MCQ's

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When platinum wire is heated, then at the temperature of 500 ^oC, it becomes: