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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maha 01 - Mar - 2023 04 Min 24 Sec 35/120

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	Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in	A. 1890 B. 1895 C. 1900 D. 1905
3	Intensity of light determines the:	A. Energy of each photon B. Number of photons C. Speed of photons D. Size of photons
4	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
5	Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as	A. ON switch B. off switch C. function switch D. none of these
6	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
7	When a platinum wire is heated, it appears orange red at	A. 500°C B. 900°C C. 1100°C D. 1300°C
8	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
9	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well
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

Practically the quantity v/c is always:

The special theory of relatively treats the problems involving:

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

A black body is

The energy of the 4th orbit in hydrogen atom is

The energy of a photon is represented by

According to the special theory of relativity

the symbol to be used in relativity problems denotes:

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

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

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

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

According to the Max plank, energy is redialed or absorbed in

According to the de-Brogile relation, an object of large mass and ordinary speed has

The year when A.H. compton was awarded Nobel Prize is:

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

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

When a platinum wire is heated, it appears white at

Electromagnetic -radiation means:

There is no way to detect:

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

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

the dilation of time applies to the timing processes which are:

0.1 kg mass will be equivalent to the energy

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

The special theory of relativity treats problems invoving

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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

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

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

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