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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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 Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
2	Photoelectric effect takes place with a photon of:	A. Very high energy B. Very low energy C. Low energy D. High energy
3	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
4	The value of the Stephen's constant for black body radiations is given by	A. 5.6 x 10⁸Wm^-2K^-4 B. 5.67 x 10^-8Wm^-2K^-4 C. 2.9 x 10^-3mK D. 2.9 x 10³mK
5	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
6	the symbol to be used in relativity problems denotes:	A. Dilated time B. Proper time C. Life time D. Half time
7	The value of the plank's constant 'h' is given by	A. 1.6 x 10^-19J B. 1.67 x 10^-27Kg C. 6.63 x 10³⁴Js D. 6.63 x 10^-34Js
8	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well
9	When a position comes close to an electron they annihilate into	A. one photon B. two photons which travel in the same direction C. two photons which travels in the opposite direction D. two photons which travel in any direction
10	The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be	A. 500 m B. 500 nm C. 500 km D. 500 cm

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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

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

Photoelectric effect takes place with a photon of:

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

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

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

The unit of work function is:

de-Broglies hypthesis was experimentally verified by

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

Converse of pair production is known as

The value of threshold frequency for different metals is

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

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

The length contraction happens only

Wave nature of particle was proposed by

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

Electromagnetic radiation or photons interact with matter in

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

According to the Max plank, energy is redialed or absorbed in

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

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

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

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

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

Electromagnetic -radiation means:

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

Wien's constant is measured in:

The mass of an object will be doubled at speed

Photoelectrons are emitted when ultraviolet light falls on:

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

The special theory of relativity is based on the

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