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

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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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Ziyad Rehman Sheikh 16 - Nov - 2022 07 Min 21 Sec 40/120
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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	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
2	Which one of the following physical quantities changes with relativistic speed	A. Length B. Mass C. Time D. All of the above
3	Which of the following is not an example of intertial frame	A. a body placed on the surface of earth B. a body placed in a car moving with uniform velocity C. a body placed in a car moving with same acceleration D. none of these
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	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
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	As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:	A. Smaller B. Lerger C. Same D. Much larger
8	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
9	the symbol to be used in relativity problems denotes:	A. Dilated time B. Proper time C. Life time D. Half time
10	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

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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

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

Photoelectric effect takes place with a photon of:

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

The special theory of relativity is based on the

The special theory of relativity treats problems invoving

Strictly speaking, the earth is:

Momentum is a parameter associated with

The idea of quantization of energy was proposed by:

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

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

The year when A.H. compton was awarded Nobel Prize is:

At the temperature, a body emits radiation which is principally

When a position comes close to an electron they annihilate into

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

S.I. unit of planks constant is

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

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

The concept of direction is purely:

Wien's constant is measured in:

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

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

An inertial frame is that frame in which

Davision and Germer performed experiment to verify

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

The energy of a photon is represented by

The existence of position was predicted by Dirace in

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

The length contraction happens only

Compton was awarded Nobel prize in physics in

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

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