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

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Asghar Ali 03 - Mar - 2021 10 Min 50 Sec 100/120
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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

Sr.#	Question	Answer
1	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
2	The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by	A. Max plank B. Newton C. Einstein D. J.J. Thomson
3	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
4	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
5	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
6	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
7	According to the special theory of relativity, a moving clock	A. runs faster B. runs slower C. neither runs faster nor slower D. all of these
8	A particle having mass and charge equal to that of an electron is called:	A. Proton B. Positron C. Pion D. Pi-meson
9	When platinum wire is heated, it appears cherry red at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
10	In photoelectric effect the energy of ejected electrons depend on	A. The frequency B. The intensity C. Both frequency and intensity 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

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

Photoelectric effect takes place with a photon of:

Victor de-Brogile received the Nobel prize in physics in

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

the symbol to be used in relativity problems denotes:

0.1 kg mass will be equivalent to the energy

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

In photoelectric effect the energy of ejected electrons depend on

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

Which of the following is not an example of intertial frame

Newton's law of motion do not hold in

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

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

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

A photon is considered to have

According to the special theory of relativity, a moving clock

When a platinum wire is heated, it appears yellow at

Practically the quantity v/c is always:

An inertial frame is that frame in which

The nature of radiations emitted by a hot body depends upon its:

The photon of radio-waves has energy of about

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

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

Pair production is the phenomenon in which

When a platinum wire is heated, it appears white at

Momentum is a parameter associated with

The special theory of relatively treats the problems involving:

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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

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

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