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 general theory of relativity treats problems involving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
2	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
3	The existence of position was predicted by Dirace in	A. 1920 B. 1925 C. 1930 D. 1928
4	Photocell is a device which converts	A. chemical energy into electrical energy B. electrical energy into light energy C. heat energy into electrical energy D. light energy into electrical energy
5	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
6	The way through which electromagnetic radiations or photons interact with matter depends upon their:	A. Wavelength B. Frequency C. Energy D. Temperature
7	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
8	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
9	Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of	A. photoelectric effect B. pair production C. Compton effect D. uncertainty principle
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

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

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

Electromagnetic -radiation means:

Strictly speaking, the earth is:

Electromagnetic radiation or photons interact with matter in

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

Photoelectrons are emitted when ultraviolet light falls on:

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

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

The existence of position was predicted by Dirace in

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

Converse of pair production is known as

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

Compton was awarded Nobel prize in physics in

The concept of direction is purely:

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

The energy of the 4th orbit in hydrogen atom is

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

When a platinum wire is heated, it appears white at

The photoelectric effect, the maximum energy of photoelectrons depends on the

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

Victor de-Brogile received the Nobel prize in physics in

A black body is

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

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

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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

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

There is no way to detect:

Which of the following is not an example of intertial frame

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ECAT Physics Chapter 19 Important MCQ's

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