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	The special theory of relativity treats problems invoving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
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	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	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
5	At the temperature, a body emits radiation which is principally	A. of long wavelengths in the visible region B. of long wavelengths in the invisible infrared region C. of short wavelength in invisible ultraviolet region D. none of these
6	The idea of quantization of energy was proposed by:	A. Einstein B. Max.Planck C. Maxwell D. Bohr
7	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
8	Compton was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
9	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
10	Which of the following is not an example of intertial frame	A. a body placed on the surface of earth B. a body placed in a car moving with uniform velocity C. a body placed in a car moving with same acceleration D. none of these

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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

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

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

An intertial frame of reference is a frame of reference which is

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

Which of the following is not an example of intertial frame

The value of threshold frequency for different metals is

de-Broglies hypthesis was experimentally verified by

Compton was awarded Nobel prize in physics in

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

Compton shift refers to:

According to the special theory of relativity

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

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

At the temperature, a body emits radiation which is principally

The energy of a photon is represented by

When a platinum wire is heated, it appears white at

Position was discovered by Carl Anderson in

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

The idea of quantization of energy was proposed by:

Photoelectric effect takes place with a photon of:

In photoelectric effect the energy of ejected electrons depend on

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

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

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

The photon of radio-waves has energy of about

When a position comes close to an electron they annihilate into

A photon is considered to have

Which one of the following physical quantities changes with relativistic speed

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

The special theory of relativity is based on:

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