Electromagnetic Waves MCQs Class 12 Physics Chapter 8 Questions with Answers

In Class 12 Physics Chapter 8 Electromagnetic Waves MCQs, students get a chance to test their basic to advanced knowledge in a very interactive way. Practicing class 12 physics chapter 8 mcq is very useful as these questions are often asked in class 12 board exams.

This class 12 class 8 physics chapter explains Maxwell’s equations, displacement current, and how electromagnetic waves propagate in free space. Solving class 12 electromagnetic waves mcq will make you confident about the concepts like wave nature, speed of EM waves, and their applications in daily life. Students search for mcq on electromagnetic waves class 12 because MCQs help in quick revision before exams and also improve problem solving speed.

In the electromagnetic waves class 12 mcq, you will find questions from the NCERT text that are strictly based on class 12 physics syllabus. These Class 12 physics mcqs are not only important for scoring marks but also for building logical thinking.

Electromagnetic Waves MCQs Class 12 Physics Chapter 8 with Answers

Here are MCQs with answers based on Class 12 Physics Chapter 8: Electromagnetic Waves.

Q1. Electromagnetic waves are…

a) Longitudinal

b) Transverse

c) Both a and b

d) Stationary

Answer: b) Transverse

Q2. Who gave the theoretical basis for electromagnetic waves?

a) Newton

b) Maxwell

c) Einstein

d) Hertz

Answer: b) Maxwell

Q3. Which part of the electromagnetic spectrum has the shortest wavelength?

a) Radio waves

b) X-rays

c) Gamma rays

d) Infrared rays

Answer: c) Gamma rays

Q4. Speed of electromagnetic waves in vacuum is…

a) 3×10⁶ m/s

b) 3×10⁸ m/s

c) 1.5×10⁸ m/s

d) 3×10⁵ m/s

Answer: b) 3×10⁸ m/s

Q5. In electromagnetic waves, the electric and magnetic fields are…

a) Parallel

b) Perpendicular to each other

c) In opposite direction

d) Absent

Answer: b) Perpendicular to each other

Q6. Which electromagnetic wave is used in night vision devices?

a) Ultraviolet rays

b) Infrared rays

c) Microwaves

d) X-rays

Answer: b) Infrared rays

Q7. Which scientist experimentally produced and detected electromagnetic waves?

a) Faraday

b) Hertz

c) Planck

d) Maxwell

Answer: b) Hertz

Q8. The energy of an electromagnetic wave depends on…

a) Wavelength

b) Frequency

c) Amplitude only

d) None of these

Answer: b) Frequency

Q9. The region of EM waves used in TV broadcasting is…

a) Radio waves

b) Microwaves

c) Infrared rays

d) Gamma rays

Answer: a) Radio waves

Q10. The oscillations of the electric and magnetic field in EM waves are…

a) In same direction

b) Always perpendicular to each other

c) Random

d) None of the above

Answer: b) Always perpendicular to each other

Q11. Which EM wave is used in sterilizing surgical instruments?

a) X-rays

b) Ultraviolet rays

c) Infrared rays

d) Gamma rays

Answer: b) Ultraviolet rays

Q12. Which wave is used for satellite communication?

a) Gamma rays

b) Infrared rays

c) Microwaves

d) Ultraviolet rays

Answer: c) Microwaves

Q13. Which of the following is non-ionizing radiation?

a) X-rays

b) Ultraviolet

c) Gamma rays

d) Radio waves

Answer: d) Radio waves

Q14. The unit of frequency is…

a) Joule

b) Hertz

c) Tesla

d) Weber

Answer: b) Hertz

Q15. The electromagnetic wave nature was confirmed experimentally by…

a) Maxwell

b) Einstein

c) Hertz

d) Bohr

Answer: c) Hertz

Q16. Which EM radiation is used in radar systems?

a) Infrared

b) Microwaves

c) Visible light

d) Gamma rays

Answer: b) Microwaves

Q17. The visible spectrum wavelength range is about…

a) 400 nm to 700 nm

b) 100 nm to 200 nm

c) 10 nm to 50 nm

d) 1 mm to 10 mm

Answer: a) 400 nm to 700 nm

Q18. Which wave has maximum penetrating power?

a) X-rays

b) Ultraviolet

c) Gamma rays

d) Microwaves

Answer: c) Gamma rays

Q19. Speed of EM waves in a medium depends on…

a) Refractive index

b) Temperature

c) Frequency

d) Both a and c

Answer: a) Refractive index

Q20. EM waves transfer…

a) Only mass

b) Only matter

c) Energy and momentum

d) Pressure only

Answer: c) Energy and momentum

Q21. Polarization is a property of…

a) Sound waves

b) Longitudinal waves

c) Transverse waves

d) Radioactive particles

Answer: c) Transverse waves

Q22. Which EM waves are harmful for human DNA?

a) Infrared

b) Microwaves

c) Ultraviolet

d) Radio waves

Answer: c) Ultraviolet

Q23. The electromagnetic spectrum was first arranged by…

a) Maxwell

b) Faraday

c) Herschel

d) Newton

Answer: c) Herschel

Q24. Which EM wave helps in Vitamin D formation in skin?

a) Infrared

b) Ultraviolet

c) Gamma rays

d) Microwaves

Answer: b) Ultraviolet

Q25. For EM waves, the ratio of electric to magnetic fields is equal to…

a) c

b) 1/c

c) μ

d) ϵ

Answer: a) c

Q26. Which type of EM wave is used in remote controls?

a) Infrared

b) UV rays

c) Visible light

d) X-rays

Answer: a) Infrared

Q27. The SI unit of wavelength is…

a) Hertz

b) Tesla

c) Metre

d) Newton

Answer: c) Metre

Q28. Which EM wave has the lowest energy?

a) Radio waves

b) Infrared rays

c) X-rays

d) Gamma rays

Answer: a) Radio waves

Q29. Which EM waves are used for medical imaging (CT scan)?

a) Radio waves

b) Microwaves

c) X-rays

d) Gamma rays

Answer: c) X-rays

Q30. The direction of propagation of EM waves is…

a) Along electric field only

b) Along magnetic field only

c) Perpendicular to both electric and magnetic fields

d) Opposite to both

Answer: c) Perpendicular to both electric and magnetic fields