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

Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

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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 energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
2	The energy of photon 'E' is proported to	A. The magnetic field H B. The electric field E C. Both the electric and magnetic field H and E D. Frequency
3	The special theory of relatively treats the problems involving:	A. Inertial frames of reference B. Non-inertial frames C. Non-accelerated frame D. Botha (A) and (C)
4	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
5	If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:	A. Newton B. Joule C. Joule-Sec D. Joule-s^-1
6	Strictly speaking, the earth is:	A. An accelerated frame of reference B. A non-inertial frame of reference C. An inertial frame of reference D. ^{A non-accelerated frame of reference}
7	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates
8	Intensity of light determines the:	A. Energy of each photon B. Number of photons C. Speed of photons D. Size of photons
9	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
10	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

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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

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

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

The concept of direction and position are purely

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

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

When a position comes close to an electron they annihilate into

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

A photon is considered to have

In photoelectric effect the energy of ejected electrons depend on

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 positron was discovered by:

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

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

The photon of radio-waves has energy of about

Davision and Germer performed experiment to verify

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

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

Momentum is a parameter associated with

The energy of a photon is represented by

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

The general theory of relativity treats problems involving

If a body reaches a speed equal to the speed of light, then its mass will became

The unit of work function is:

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

The special theory of relatively treats the problems involving:

The nature of radiations emitted by a hot body depends upon its:

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

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

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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