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

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ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
2	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
3	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
4	The photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
5	A photon is considered to have	A. Momentum B. Energy C. Wavelength D. All of the above
6	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
7	Electromagnetic -radiation means:	A. Photons B. protons C. Electrons D. Mesons
8	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
9	The energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
10	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal

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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

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

Compton shift refers to:

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

The mass of an object will be doubled at speed

The special theory of relativity treats problems invoving

the symbol to be used in relativity problems denotes:

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 non-inertial frame of reference is one, in which

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

When platinum wire is heated, it appears cherry red at

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

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

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

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

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

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

There is no way to detect:

An inertial frame is that frame in which

The idea of quantization of energy was proposed by:

When a platinum wire is heated, it appears dull red at about

If a material object moves with the speed of light 'C' its mass becomes

When a position comes close to an electron they annihilate into

When a platinum wire is heated, it appears white at

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

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

Photoelectric effect takes place with a photon of:

Electromagnetic -radiation means:

A bar 1.0 m in length and located along x-axix moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is

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ECAT Physics Chapter 19 Important MCQ's

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