NeetVictoryQuestion 1: Electromagnetic Spectrum
Radar uses:
- A microwaves
- B X-rays
- C gamma rays
- D ultraviolet rays
Answer: A. microwaves
Why: Short-wavelength microwaves can be beamed and reflected from aircraft and rain.
NEET Physics: Electromagnetic Waves. Chapter-wise Practice Questions and Test
Electromagnetic Waves is a Class 12 Physics chapter that carries about 3.1% of the Physics questions in NEET. Practise it with 43 questions covering 2 topics, each with an explanation.
Practise Electromagnetic Waves
Open in the appSets of 15 questions that adapt to your level, with an explanation for every answer.
Topics covered in Electromagnetic Waves
- Electromagnetic Spectrum (22 questions)
- Properties of Electromagnetic Waves (21 questions)
How often Electromagnetic Waves has come up in NEET
Across the 13 previous year papers, Electromagnetic Waves had 19 questions, about 1.5 a year. The most in one paper was 2, in NEET 2019.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 1 |
| NEET 2025 | 2 |
| NEET 2024 | 2 |
| NEET 2023 | 1 |
| NEET 2022 | 2 |
| NEET 2021 | 2 |
| NEET 2020 | 2 |
| NEET 2019 | 2 |
| NEET 2018 | 1 |
| NEET 2017 | 1 |
| NEET 2016 | 1 |
| Re-AIPMT 2015 | 1 |
| AIPMT 2014 | 1 |
Sample questions on Electromagnetic Waves with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 2: Properties of Electromagnetic Waves
Maxwell introduced the concept of displacement current mainly to explain:
- A the continuity of current in a circuit containing a charging capacitor
- B the flow of current in a plain conductor
- C resistance in AC circuits
- D the photoelectric effect
Answer: A. the continuity of current in a circuit containing a charging capacitor
Why: Displacement current, arising from a changing electric field, was introduced by Maxwell so Ampere's law remains consistent even where conduction current is discontinuous, as between capacitor plates.
Question 3: Electromagnetic Spectrum
An FM station broadcasts at 100 MHz. The wavelength of its signal is:
- A 0.3 m
- B 3 m
- C 300 m
- D 30 m
Answer: B. 3 m
Why: λ = 3 × 10⁸/10⁸ = 3 m.
Question 4: Properties of Electromagnetic Waves
Maxwell's four equations describe:
- A the structure of atoms
- B the motion of charged particles only
- C the sources and the behaviour of the electric and magnetic fields, and predict electromagnetic waves
- D heat flow in solids
Answer: C. the sources and the behaviour of the electric and magnetic fields, and predict electromagnetic waves
Why: They are Gauss's law for E and for B, Faraday's law and the Ampere–Maxwell law.
Question 5: Electromagnetic Spectrum
The greenhouse effect is mainly due to the trapping by the atmosphere of:
- A infrared radiation emitted by the Earth
- B radio waves from the ionosphere
- C X-rays from space
- D ultraviolet radiation from the Sun
Answer: A. infrared radiation emitted by the Earth
Why: The Earth radiates in the infrared, and gases such as CO₂ absorb it and warm the lower atmosphere.
Question 6: Properties of Electromagnetic Waves
The speed of electromagnetic waves in vacuum is given by:
- A √(μ₀/ε₀)
- B μ₀/ε₀
- C √(μ₀ε₀)
- D 1/√(μ₀ε₀)
Answer: D. 1/√(μ₀ε₀)
Why: Maxwell's equations give c = 1/√(μ₀ε₀) ≈ 3 × 10⁸ m/s.
Question 7: Electromagnetic Spectrum
The ozone layer in the upper atmosphere protects living things by absorbing:
- A radio waves
- B ultraviolet radiation
- C infrared radiation
- D visible light
Answer: B. ultraviolet radiation
Why: Ozone strongly absorbs the harmful short-wavelength ultraviolet radiation from the Sun.
Question 8: Properties of Electromagnetic Waves
In an electromagnetic wave travelling in free space, the ratio of the magnitudes of the electric field E0 to the magnetic field B0 equals:
- A the speed of light c
- B 1/c
- C c²
- D μ0ε0
Answer: A. the speed of light c
Why: For an EM wave in vacuum, E0/B0 = c, the speed of light.
Practise all of Electromagnetic Waves
Open in the appFrequently asked questions
How many questions come from Electromagnetic Waves in NEET?
Electromagnetic Waves carries about 3.1% of the Physics questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 19 times, about 1.5 questions a year.
Which class is Electromagnetic Waves from?
Electromagnetic Waves is a Class 12 Physics chapter in the NCERT syllabus.
Where can I practise Electromagnetic Waves questions for NEET?
NeetVictory has 43 practice questions on Electromagnetic Waves, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.