NEW DELHI: Electromagnetic fields are crucial not only for physics but also for various medical technologies. With the rapid advancements in medical imaging, X-rays, MRI machines, and radiation therapies, understanding the principles behind electromagnetic waves is becoming increasingly important for future doctors.
The Electromagnetic Field section in NEET UG 2025 is undeniably tough, but with focused preparation and strategic practice, aspirants can master the concepts and excel in the exam. These 25 tough MCQs are an excellent resource to test and reinforce the knowledge required to face the complexities of the exam head-on.
Join NEET News 2025 NEET UG 2025: Quiz on Electromagnetic Field
1.
Question: In an electromagnetic wave, the electric field and magnetic field are:
a) Parallel to each other
b) Perpendicular to each other and to the direction of propagation
c) Perpendicular to each other but in the same direction of propagation
d) Parallel to the direction of propagation
2.
Question: The speed of light in a vacuum is approximately:
a) 3×10^6 m/s
b) 3×10^8 m/s
c) 6×10^8 m/s
d) 6×10^6 m/s
3.
Question: Which of the following electromagnetic waves has the shortest wavelength?
a) Radio waves
b) Microwaves
c) Infrared waves
d) Gamma rays
4.
Question:
Match the following:
| Electromagnetic Phenomena | Description |
| 1. Faraday’s Law | a) The electric field created by a changing magnetic field |
| 2. Ampere’s Law | b) The relationship between current and magnetic field |
| 3. Maxwell’s Equations | c) The unified description of electric and magnetic fields |
| 4. Gauss’s Law for Electric Fields | d) The electric flux through a closed surface is proportional to charge enclosed |
Options:
a) 1-a, 2-b, 3-c, 4-d
b) 1-b, 2-c, 3-a, 4-d
c) 1-c, 2-b, 3-d, 4-a
d) 1-d, 2-a, 3-b, 4-c
5.
Question: The energy in an electromagnetic wave is carried by:
a) Only the electric field
b) Only the magnetic field
c) Both the electric and magnetic fields
d) Neither electric nor magnetic field
6.
Question:
Match the following:
| Electromagnetic Waves | Properties |
| 1. Gamma Rays | a) Long wavelength, used for communication |
| 2. X-rays | b) High frequency, used in medical imaging |
| 3. Radio Waves | c) Used in cooking and radar systems |
| 4. Microwaves | d) Short wavelength, high energy waves |
Options:
a) 1-d, 2-b, 3-a, 4-c
b) 1-b, 2-c, 3-d, 4-a
c) 1-c, 2-d, 3-b, 4-a
d) 1-a, 2-b, 3-c, 4-d
7.
Question: The magnetic field associated with a current-carrying conductor is:
a) Radial
b) Circular
c) Linear
d) Longitudinal
8.
Question: In a plane electromagnetic wave, the electric and magnetic fields are:
a) In phase
b) 180° out of phase
c) 90° out of phase
d) Randomly out of phase
9.
Question: In an electromagnetic wave, the energy density in the electric field is:
a) Proportional to the square of the magnetic field
b) Equal to the energy density in the magnetic field
c) Proportional to the square of the electric field
d) Independent of the magnetic field
10.
Question: The intensity of an electromagnetic wave is proportional to:
a) Square of the electric field
b) Square of the magnetic field
c) Product of the electric and magnetic fields
d) Inverse square of the distance
11.
Question: The energy of an electromagnetic wave is directly proportional to:
a) Its frequency
b) Its wavelength
c) Its amplitude
d) Its direction of propagation
12.
Question: Which of the following properties of electromagnetic waves is not dependent on the medium through which they propagate?
a) Speed
b) Wavelength
c) Frequency
d) Energy
13.
Question: The Poynting vector represents:
a) Direction of propagation of an electromagnetic wave
b) Electric field strength
c) Magnetic field strength
d) Rate of energy flow
14.
Question: In a vacuum, the electric and magnetic field vectors of an electromagnetic wave:
a) Are in phase
b) Have a phase difference of 90∘
c) Have a phase difference of 180∘
d) Are independent of each other
15.
Question: In a time-varying magnetic field, an electric field is induced. This phenomenon is described by:
a) Ampere’s Law
b) Faraday’s Law of Induction
c) Gauss’s Law
d) Biot-Savart Law
16.
Question:
Match the following:
| Terms | Units |
| 1. Electric Field | a) Ampere per meter (A/m) |
| 2. Magnetic Field | b) Tesla (T) |
| 3. Speed of Light | c) Meters per second (m/s) |
| 4. Magnetic Permeability | d) Henry per meter (H/m) |
Options:
a) 1-b, 2-d, 3-c, 4-a
b) 1-c, 2-b, 3-a, 4-d
c) 1-a, 2-c, 3-d, 4-b
d) 1-d, 2-a, 3-b, 4-c
17.
Question: The unit of the electric field in an electromagnetic wave is:
a) Ampere
b) Volt per meter
c) Tesla
d) Watt per square meter
18.
Question: The direction of the magnetic field in a plane electromagnetic wave is:
a) Parallel to the direction of wave propagation
b) Perpendicular to the electric field
c) Parallel to the electric field
d) Radial to the wavefront
19.
Question: The electromagnetic spectrum is divided into various regions based on:
a) Frequency
b) Wavelength
c) Energy
d) All of the above
20.
Question: Which of the following regions of the electromagnetic spectrum is used for communication?
a) X-rays
b) Ultraviolet rays
c) Radio waves
d) Gamma rays
21.
Question:
Assertion (A): Electromagnetic waves do not require a medium for propagation and can travel through a vacuum.
Reason (R): Electromagnetic waves are oscillations of electric and magnetic fields that propagate through space, transferring energy from one point to another.
Options:
a) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false, but Reason (R) is true.
22.
Question: The phenomenon of electromagnetic wave propagation is based on the principle of:
a) Faraday’s Law
b) Lenz’s Law
c) Maxwell’s equations
d) Coulomb’s Law
23.
Question: The direction of propagation of an electromagnetic wave is:
a) Parallel to the electric field
b) Parallel to the magnetic field
c) Perpendicular to both electric and magnetic fields
d) None of the above
24.
Question: In an electromagnetic wave, the ratio of the electric field to the magnetic field is:
a) Constant in all mediums
b) Variable in different mediums
c) Zero in a vacuum
d) Equal to the speed of light
25.
Question: Which of the following electromagnetic waves has the longest wavelength?
a) X-rays
b) Microwaves
c) Infrared rays
d) Radio waves
Answer Key:
1. b 2. b 3. d 4. a 5. c 6. a 7. b 8. b 9. b 10. a 11. a 12. c 13. d 14. a 15. b 16. a 17. b 18. b 19. d 20. c 21. a 22. c 23. c 24. d 25. d
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