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

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

00:00
Question # 1

A non-inertial frame of reference is one, in which

Question # 2

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

Question # 3

The value of the plank's constant 'h' is given by

Question # 4

de-Broglies hypthesis was experimentally verified by

Question # 5

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

Question # 6

The special theory of relativity is based on the

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

The unit of work function is:

Question # 11

When platinum wire is heated, it appears cherry red at

Question # 12

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

Question # 13

In photoelectric effect the energy of ejected electrons depend on

Question # 14

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

Question # 15

The general theory of relativity treats problems involving

Question # 16

Intensity of light determines the:

Question # 17

Absolute motion cannot be detected

Question # 18

The positron was discovered by:

Question # 19

At the temperature, a body emits radiation which is principally

Question # 20

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

Question # 21

An inertial frame is that frame in which

Question # 22

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

Question # 23

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

Question # 24

Strictly speaking, the earth is:

Question # 25

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

Question # 26

Newton's law of motion do not hold in

Question # 27

Photoelectrons are emitted when ultraviolet light falls on:

Question # 28

The energy of a photon is represented by

Question # 29

Which of the following is not an example of intertial frame

Question # 30

the symbol to be used in relativity problems denotes:

Submit

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


Topic Test

00:00
Submit

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 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time
2 The unit of work function is:
A. Joule
B. Electron volt
C. That of threshold frequency
D. Both (A) and (B)
3 A high temperature, the proportion of shorter wavelengths radiation, emitted by the body
A. decreases
B. first increases then decreases
C. increases
D. any one of them
4 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
5 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
6 When a high energy photon interact with a metal, which of the following effect is most likely to be taken place
A. pair production
B. photoelectric effect
C. Compton effect
D. None of these
7 The idea of quantization of energy was proposed by:
A. Einstein
B. Max.Planck
C. Maxwell
D. Bohr
8 The way through which electromagnetic radiations or photons interact with matter depends upon their:
A. Wavelength
B. Frequency
C. Energy
D. Temperature
9 According to Einstein, with the great increase in the speed of the body the relativistic length of the body
A. Remains constant
B. Decreases
C. Increases
D. Reduces to zero
10 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:
A. Smaller
B. Lerger
C. Same
D. Much larger

Test Questions

Is this page helpful?