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	Newton's law of motion do not hold in	A. an accelerated frame of reference B. an unaccelerated frame of reference C. both of these D. none of these
2	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well
3	When a platinum wire is heated, it appears white at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
4	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
5	The special theory of relativity treats problems invoving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
6	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
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	According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the	A. number of photoelectrons B. size of the photoelectrons C. charge on photoelectrons D. K.E of photoelectrons
9	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
10	The energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²

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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

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

0.1 kg mass will be equivalent to the energy

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

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

Which one of the following physical quantities changes with relativistic speed

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

Strictly speaking, the earth is:

If a material object moves with the speed of light 'C' its mass becomes

The concept of direction and position are purely

The unit of work function is:

The inside cavity of the black body is

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

The general theory of relativity treats problems involving

Converse of pair production is known as

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

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

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

Davision and Germer performed experiment to verify

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

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

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

Compton was awarded Nobel prize in physics in

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

According to the special theory of relativity, a moving clock

When a position comes close to an electron they annihilate into

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

The mass of an object will be doubled at speed

de-Broglies hypthesis was experimentally verified by

G.P. Thomson observer experimentally that electrons and neutrons possess

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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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