ECAT Pre General Science Chapter 19 online mcq test with answers for Physics chapter 19 (Dawn of Modern Physics)

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Asghar Ali 03 - Mar - 2021 10 Min 50 Sec 100/120
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khadim Hussain 03 - Mar - 2021 10 Min 50 Sec 75/120
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Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
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Aarij 08 - Dec - 2024 02 Min 25 Sec 65/120
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maha 01 - Mar - 2023 04 Min 24 Sec 35/120

ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	Davision and Germer performed experiment to verify	A. de-Brogile hypothesis B. theory of relativity C. Newton's law of gravitation D. Mass-energy relation
2	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
3	A particle having mass and charge equal to that of an electron is called:	A. Proton B. Positron C. Pion D. Pi-meson
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	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
6	The concept of direction and position are purely	A. absolute B. relative C. absolute or relative D. none of these
7	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
8	The value of threshold frequency for different metals is	A. different B. same C. may be different or may be same D. none of these
9	The unit of work function is:	A. Joule B. Electron volt C. That of threshold frequency D. Both (A) and (B)
10	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

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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 photoelectric effect the energy of ejected electrons depend on

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

The general theory of relativity treats problems involving

The Einstein's changes in length, mass and time are not observed in common life because

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

Photoelectric effect takes place with a photon of:

When a platinum wire is heated, it appears white at

S.I. unit of planks constant is

The special theory of relatively treats the problems involving:

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

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

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

According to the special theory of relativity, time is

Compton was awarded Nobel prize in physics in

An inertial frame is that frame in which

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

Compton shift refers to:

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

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

The photoelectric effect, the maximum energy of photoelectrons depends on the

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

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

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

Which one of the following physical quantities changes with relativistic speed

Momentum is a parameter associated with

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

At the temperature, a body emits radiation which is principally

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

The special theory of relativity is based on the

The energy of photon 'E' is proported to

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ECAT Physics Chapter 19 Important MCQ's

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