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	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
2	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
3	The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of	A. 2 cm/s B. 20 cm/s C. 200 cm/s D. 2000 cm/s
4	From the theory of relativity, momentum p of the photon is related to energy as	A. p = hfc B. p = hf/c C. p = f(hc,f) D. p = cf/h
5	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
6	At the temperature, a body emits radiation which is principally	A. of long wavelengths in the visible region B. of long wavelengths in the invisible infrared region C. of short wavelength in invisible ultraviolet region D. none of these
7	Converse of pair production is known as	A. Compton effect B. annihilation of matter C. photoelectric effect D. none of these
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	If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers	A. larger B. shorter C. equal D. none of these
10	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

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

Strictly speaking, the earth is:

Newton's law of motion do not hold in

Pair production is the phenomenon in which

The energy of a photon is represented by

The existence of position was predicted by Dirace in

The energy of the 4th orbit in hydrogen atom is

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

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

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

The inside cavity of the black body is

The unit of work function is:

Compton shift refers to:

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

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

Electromagnetic radiation or photons interact with matter in

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

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

There is no way to detect:

According to the special theory of relativity

The special theory of relativity is based on the

In order to produce pair production, a photon must have a energy

The special theory of relativity is based on:

The photon of radio-waves has energy of about

When a position comes close to an electron they annihilate into photons such that

Absolute motion cannot be detected

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

Intensity of light determines the:

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

The concept of direction is purely:

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Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

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: