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

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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	Absolute motion cannot be detected	A. in its own frame of references B. in a different frame of references C. both in its frame and different frame of references D. none of these
2	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
3	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
4	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
5	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
6	A non-inertial frame of reference is one, in which	A. law of inertial is valid B. all laws of physics are the same in all frames C. a>0 or a<0 D. a=0
7	With the help of 50 K v electron microscope, a resolution of	A. 0.5 to 1 m to possible B. 1 m to 10 m is possible C. 0.5 to 1 nm is possible D. 1 to 10 nm is possible
8	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
9	When the atomic particle are moving with velocities approaching that of light:	A. Newton's laws become valid B. Relativistic effects become prominent C. Botha(A) and (B) are valid D. Neither (A)nor (B)
10	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer

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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 idea of quantization of energy was proposed by:

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

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

Newton's law of motion do not hold in

The mass of an object will be doubled at speed

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

The energy of a photon is represented by

Photocell is a device which converts

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

At the temperature, a body emits radiation which is principally

According to the special theory of relativity, a moving clock

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

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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

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

S.I. unit of planks constant is

When platinum wire is heated, it appears cherry red at

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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

Position was discovered by Carl Anderson in

In photoelectric effect the energy of ejected electrons depend on

The Stephen-Boltzmann law for the black body radiation is given by

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

The concept of direction and position are purely

Wien's constant is measured in:

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

The special theory of relativity is based on the

The value of threshold frequency for different metals is

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

An inertial frame is that frame in which

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