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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shamsuddin 19 - Aug - 2021 10 Min 50 Sec 75/120
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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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Waleed Ahmed 26 - Feb - 2023 10 Min 00 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	The year when A.H. compton was awarded Nobel Prize is:	A. 1923 B. 1927 C. 1931 D. 1935
2	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
3	When a platinum wire is heated, it appears orange red at	A. 500°C B. 900°C C. 1100°C D. 1300°C
4	G.P. Thomson observer experimentally that electrons and neutrons possess	A. particle-like properties B. wave-like properties C. neither particle nor wave like properties D. none of these
5	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates
6	The unit of work function is:	A. Joule B. Electron volt C. That of threshold frequency D. Both (A) and (B)
7	The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum	A. 2.9 s B. 3.0 s C. 6.6 s D. 9.6 s
8	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
9	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
10	Max Planck received the Nobel Prize for his discovery of energy quants in:	A. 1718 AD B. 1918 AH C. 1818 AD D. 1918 AD

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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

Newton's law of motion do not hold in

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

The positron was discovered by:

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

The special theory of relativity is based on the

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

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

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

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

Electromagnetic -radiation means:

Compton shift refers to:

The mass of an object will be doubled at speed

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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

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

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

With the help of 50 K v electron microscope, a resolution of

When the atomic particle are moving with velocities approaching that of light:

The existence of position was predicted by Dirace in

When a platinum wire is heated, it appears yellow at

Pair production is the phenomenon in which

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

When a position comes close to an electron they annihilate into

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

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

The value of threshold frequency for different metals is

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

Position was discovered by Carl Anderson in

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

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