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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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	According to the special theory of relativity	A. mass and energy are same entities B. mass and energy are same entities but interconverible C. mass and energy are different entities but interconverible D. mass and energy are different entities but non-interconveritble
2	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
3	If a body reaches a speed equal to the speed of light, then its mass will became	A. zero B. very small C. infinity D. none of these
4	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
5	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion
6	According to the Max plank, energy is redialed or absorbed in	A. discrete packets B. continuous waves C. either of them D. none of these
7	The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of	A. 2 cm/s B. 20 cm/s C. 200 cm/s D. 2000 cm/s
8	When a position comes close to an electron they annihilate into photons such that	A. each photon has energy 0.51 Me v B. each photon has energy 1.02 Me v C. each photon has energy 0.25 Me v D. none of these
9	Photoelectric effect takes place with a photon of:	A. Very high energy B. Very low energy C. Low energy D. High energy
10	Pair production is the phenomenon in which	A. matter is converted into energy B. energy is converted into matter C. light is converted into electrical energy D. electrical energy is converted into light

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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

Strictly speaking, the earth is:

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

The inside cavity of the black body is

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

0.1 kg mass will be equivalent to the energy

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

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

The special theory of relatively treats the problems involving:

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

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

Compton studied the scattering of x-rays by loosely bound electrons from:

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

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

Pair production is the phenomenon in which

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

Max Planck received the Nobel Prize for his discovery of energy quants in:

When a platinum wire is heated, it appears yellow at

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

Wien's constant is measured in:

The mass of an object will be doubled at speed

According to the special theory of relativity, time is

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

A photon is considered to have

Which one of the following physical quantities changes with relativistic speed

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

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

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

Newton's law of motion do not hold in

The existence of position was predicted by Dirace in

The photon of radio-waves has energy of about

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