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

The special theory of relativity treats problems invoving

Question # 2

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:

Question # 3

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

Question # 4

Wien's constant is measured in:

Question # 5

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

Question # 6

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

Question # 7

The mass of an object will be doubled at speed

Question # 8

The special theory of relativity is based on the

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The idea of quantization of energy was proposed by:

Question # 13

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

Question # 14

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

Question # 15

The energy of the 4th orbit in hydrogen atom is

Question # 16

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Question # 17

Electromagnetic radiation or photons interact with matter in

Question # 18

0.1 kg mass will be equivalent to the energy

Question # 19

de-Broglies hypthesis was experimentally verified by

Question # 20

A photon is considered to have

Question # 21

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

Question # 22

Photoelectric effect takes place with a photon of:

Question # 23

Which of the following is not an example of intertial frame

Question # 24

Newton's law of motion do not hold in

Question # 25

the symbol to be used in relativity problems denotes:

Question # 26

Photocell is a device which converts

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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 Photoelectrons are emitted when ultraviolet light falls on:
A. Casium
B. Silver
C. Potassium
D. Any of these
2 The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum
A. 2.9 s
B. 3.0 s
C. 6.6 s
D. 9.6 s
3 Newton's law of motion do not hold in
A. an accelerated frame of reference
B. an unaccelerated frame of reference
C. both of these
D. none of these
4 When a platinum wire is heated, it appears orange red at
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C
5 The special theory of relatively treats the problems involving:
A. Inertial frames of reference
B. Non-inertial frames
C. Non-accelerated frame
D. Botha (A) and (C)
6 A non-inertial frame of reference is one, in which
A. law of inertial is valid
B. all laws of physics are the same in all frames
C. a>0 or a<0
D. a=0
7 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time
8 Momentum is a parameter associated with
A. wave motion
B. particle motion
C. neither wave nor particle motion
D. none of these
9 Max plank received the Nobel Prize in physics for his discovery of energy quanta in
A. 1900
B. 1906
C. 1912
D. 1918
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

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!