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

Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

A

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

shamsuddin 19 - Aug - 2021 10 Min 50 Sec 75/120
K

khadim Hussain 03 - Mar - 2021 10 Min 50 Sec 75/120
A

Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
A

Aarij 08 - Dec - 2024 02 Min 25 Sec 65/120
W

Waleed Ahmed 26 - Feb - 2023 10 Min 00 Sec 65/120
Z

Ziyad Rehman Sheikh 16 - Nov - 2022 07 Min 21 Sec 40/120
M

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

ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	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
2	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well
3	the dilation of time applies to the timing processes which are:	A. Physical B. Chemical C. Biological D. All of these
4	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
5	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
6	The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes	A. 2 mo B. 1.67 mo C. 0.67 mo D. 2.67 mo
7	The Einstein's changes in length, mass and time are not observed in common life because	A. We dont observer then seriously B. The masses are too large C. Their speed is too small than the speed of right D. All of the above
8	As the light shines on the metal surface, the electrons are ejected	A. slowly B. instantaneously C. either of these D. none of these
9	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates
10	Due to relative motion of observer and the frame of reference of events, time always:	A. Dilates itself B. Contracts itself C. Stretches itself D. Both (A) and (C)

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

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

Photocell is a device which converts

When a position comes close to an electron they annihilate into photons such that

The energy of a photon is represented by

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

The concept of direction and position are purely

Converse of pair production is known as

0.1 kg mass will be equivalent to the energy

The existence of position was predicted by Dirace in

Due to relative motion of observer and the frame of reference of events, time always:

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

According to the special theory of relativity, a moving clock

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

From the theory of relativity, momentum p of the photon is related to energy as

Momentum is a parameter associated with

The Einstein's changes in length, mass and time are not observed in common life because

The positron was discovered by:

The inside cavity of the black body is

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

A black body is

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

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:

Pair production is the phenomenon in which

A photon is considered to have

Absolute motion cannot be detected

The concept of direction is purely:

Victor de-Brogile received the Nobel prize in physics in

The special theory of relativity treats problems invoving

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

Photoelectric effect takes place with a photon of:

Prepare Complete Set Wise ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQs Online With Answers

Set 1

Set 2

Set 3

Set 4

Set 5

Topic Test

Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

ECAT Physics Chapter 19 Important MCQ's

Test Questions

Share your comments & questions here