Physics Dawn of Modern Physics Online Mcqs Test

Q: How can I prepare for Physics Dawn of Modern Physics Online Mcqs Test?

You can prepare for Physics Dawn of Modern Physics Online Mcqs Test by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. If the frequency of incident light is less than the threshold frequency:

Answer

No electrons are emitted

Answer

Electrons are emitted with high velocity

Answer

Light is reflected

Answer

Photon splits into electrons

Question 2

2. The energy of a photon is given by:

Question 3

3. Which variable directly affects photon energy?

Answer

Angle of incidence

Answer

Wavelength

Question 4

4. What does the threshold frequency depend on?

Answer

Direction of incidence

Answer

Intensity of light

Answer

Speed of light

Answer

Nature of the metal

Question 5

5. The speed of light in vacuum is:

Answer

1.6 × 10⁻¹⁹ C

Answer

6.63 × 10⁻³⁴ J·s

Answer

3.00 × 10⁸ m/s

Answer

9.81 m/s²

Question 6

6. If frequency is doubled, photon energy becomes:

Answer

Quadrupled

Question 7

7. What is the speed of all photons in a vacuum?

Answer

Varies with frequency

Answer

3 × 10⁸ m/s

Question 8

8. What is the wavelength of a photon with high energy?

Question 9

9. What happens to the kinetic energy of emitted electrons when light intensity is increased?

Answer

Remains same

Answer

Depends on wavelength

Question 10

10. The minimum energy required to remove an electron from a metal surface is called:

Answer

Photon energy

Answer

Work function

Answer

Kinetic energy

Answer

Threshold energy

Question 11

11. The concept of quantized light energy resolved the problem of:

Answer

Static electricity

Answer

Blackbody radiation

Answer

Reflection

Answer

Diffraction

Question 12

12. What constant is used in the formula E = hf?

Answer

Coulomb’s constant

Answer

Boltzmann constant

Answer

Gravitational constant

Answer

Planck’s constant

Question 13

13. As frequency increases, what happens to the photon’s wavelength?

Answer

Stays the same

Answer

Becomes zero

Question 14

14. Which phenomenon shows both wave and particle nature of light?

Answer

Diffraction

Answer

Wave-particle duality

Answer

Polarization

Answer

Refraction

Question 15

15. Who proposed the particle nature of light?

Answer

James Clerk Maxwell

Answer

Niels Bohr

Answer

Isaac Newton

Answer

Albert Einstein

Question 16

16. According to the particle model, light transfers energy by:

Answer

Waving through space

Answer

Heating matter

Answer

Vibrating air particles

Answer

Delivering discrete packets (photons)

Question 17

17. Planck’s constant is denoted by:

Question 18

18. Who first explained blackbody radiation using quantum theory?

Answer

De Broglie

Question 19

19. Which of the following constants is required to calculate photon energy?

Answer

Avogadro number

Answer

Boltzmann constant

Answer

Planck’s constant

Answer

Gravitational constant

Question 20

20. In the particle model of light, light is composed of:

Question 21

21. What does “hf” represent in the photoelectric effect?

Answer

Energy of the photon

Answer

Kinetic energy

Answer

Total energy

Answer

Work function

Question 22

22. Which process requires photons to have energy greater than the work function?

Answer

Heating of metal

Answer

Conduction in wire

Answer

Photoelectric effect

Answer

Emission of sound

Question 23

23. What does the equation E = hf suggest about light?

Answer

It is a continuous wave

Answer

It behaves like particles

Answer

It has mass

Answer

It reflects at an angle

Question 24

24. The dual nature of light was confirmed by:

Question 25

25. Which photon has more energy?

Answer

Ultraviolet

Question 26

26. The photoelectric effect is not observed when:

Answer

Light is polarized

Answer

Frequency is below threshold

Answer

Light is monochromatic

Answer

Intensity is high

Question 27

27. The photoelectric effect supports which model of light?

Answer

Wave model

Answer

Quantum model

Answer

Huygens model

Question 28

28. Which experiment provided evidence for the particle nature of light?

Answer

Photoelectric effect

Answer

Young’s double-slit experiment

Answer

Michelson-Morley experiment

Answer

Rutherford’s gold foil experiment

Question 29

29. Which of the following supports the particle nature of light?

Answer

Reflection

Answer

Diffraction

Answer

Photoelectric effect

Answer

Refraction

Question 30

30. What happens to photon energy when frequency increases?

Answer

Remains the same

Answer

Becomes zero

Question 31

31. Which form of radiation has the highest photon energy?

Answer

Ultraviolet

Answer

Gamma rays

Answer

Radio waves

Question 32

32. Which property of light is explained only by the particle model?

Answer

Interference

Answer

Photoelectric effect

Answer

Diffraction

Answer

Reflection

Question 33

33. What is the relationship between photon energy and wavelength?

Answer

No relationship

Question 34

34. Which of the following is true about photons?

Answer

They travel at speed of light

Answer

They have mass

Answer

They have no energy

Answer

They are stationary

Question 35

35. The term “quantum” refers to:

Answer

A packet of energy

Answer

Frequency of a wave

Answer

Continuous flow of energy

Answer

Wave motion

Question 36

36. What is the momentum of a photon?

Question 37

37. Who introduced the concept of quantized energy levels?

Question 38

38. Which aspect of light is explained by wave theory, not particle theory?

Answer

Photon momentum

Answer

Photoelectric effect

Answer

Emission spectra

Answer

Interference

Question 39

39. Which of the following best demonstrates the quantized nature of light?

Answer

Total internal reflection

Answer

Absorption spectrum of hydrogen

Answer

Speed of light in vacuum

Answer

Refraction through a prism

Question 40

40. As per quantum theory, energy is:

Answer

Continuous

Answer

Conserved only in atoms

Question 41

41. What is a photon?

Answer

A particle of electricity

Answer

A particle of sound

Answer

A quantum of light energy

Answer

A massless atom

Question 42

42. Photon is a quantum of:

Answer

Electricity

Question 43

43. The color of light with the lowest photon energy is:

Question 44

44. Which unit is used to measure the energy of a photon?

Question 45

45. Who developed the concept of photons?

Question 46

46. Which electromagnetic wave has the shortest wavelength?

Answer

Radio waves

Answer

Gamma rays

Question 47

47. Which equation represents Einstein’s photoelectric equation?

Answer

E = hf – ϕ

Answer

E = hv + ϕ

Question 48

48. Which term describes the ability of photons to eject electrons?

Answer

Ionization

Answer

Photoemission

Answer

Reflection

Question 49

49. Which scientist received the Nobel Prize for explaining the photoelectric effect?

Answer

Rutherford

Question 50

Loading...

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Physics Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Physics Interview Question Answer

Physics Dawn of Modern Physics Online Mcqs Test

Important Dawn of Modern Physics Question and Answer

Dawn of Modern Physics Practice Test Online With Explanation

Uncategorized

How to Score High in Physics Dawn of Modern Physics Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Mustansar Khan

Leave a Reply Cancel reply

Important Dawn of Modern Physics Question and Answer

Dawn of Modern Physics Practice Test Online With Explanation

Uncategorized

How to Score High in Physics Dawn of Modern Physics Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Latest Updates

Mustansar Khan

Leave a Reply Cancel reply