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

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Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
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ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	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
2	When a position comes close to an electron they annihilate into photons such that	A. each photon has energy 0.51 Me v B. each photon has energy 1.02 Me v C. each photon has energy 0.25 Me v D. none of these
3	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
4	The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:	A. Wien's constant B. Stefen's constnat C. Planck's constant D. Boltzmann's constant
5	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
6	Wien's constant is measured in:	A. Metre per kelviin B. Metre kelvin C. Kelvin per meter D. Joules
7	If a body reaches a speed equal to the speed of light, then its mass will became	A. zero B. very small C. infinity D. none of these
8	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
9	Max plank received the Nobel Prize in physics for his discovery of energy quanta in	A. 1900 B. 1906 C. 1912 D. 1918
10	A photon is considered to have	A. Momentum B. Energy C. Wavelength D. All of the above

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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

The unit of work function is:

Converse of pair production is known as

According to the special theory of relativity

The concept of direction is purely:

Strictly speaking, the earth is:

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

The special theory of relatively treats the problems involving:

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

When a platinum wire is heated, it appears yellow at

According to the de-Brogile relation, an object of large mass and ordinary speed has

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

An inertial frame is that frame in which

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

Absolute motion cannot be detected

Compton shift refers to:

The special theory of relativity treats problems invoving

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

Wave nature of particle was proposed by

The energy of photon 'E' is proported to

According to the special theory of relativity, a moving clock

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

Compton was awarded Nobel prize in physics in

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

A photon is considered to have

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

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

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

de-Broglies hypthesis was experimentally verified by

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