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Electromagnetic Waves JEE Main PYQs, 2020 to 2025

Electromagnetic Waves has 101 questions in JEE Main papers from 2020 to 2025, about 17 per year across all shifts. The most asked topic is Properties of EM Waves (84 questions), followed by Displacement Current (7) and EM Spectrum (6).

Updated

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101Total PYQs
6Years covered
5Topics
2025 Apr S2Latest paper

Electromagnetic Waves questions per year

YearQuestions
202512
202417
202319
202218
202123
202012

Topic-wise weightage

TopicQuestionsShare of chapterLast asked
Properties of EM Waves8483%2025
Displacement Current77%2025
EM Spectrum66%2024
Electromagnetic Spectrum22%2023
Maxwell's Equations22%2023

Sample questions from recent papers

JEE Main 2025 · 7 Apr · Shift 2 · Properties of EM Waves

The unit of 2Iε0c\sqrt{\frac{2I}{\varepsilon_0 c}} is :

(I = intensity of an electromagnetic wave, c = speed of light)

  1. (A)

    Vm

  2. (B)

    NC-1

  3. (C)

    NC

  4. (D)

    Nm

Answer: (B)

Step-by-step solution

JEE Main 2025 · 7 Apr · Shift 1 · Displacement Current

If ϵ0\epsilon_0 denotes the permittivity of free space and ΦE\Phi_E is the flux of the electric field through the area bounded by the closed surface, then dimensions of (ϵ0dϕEdt)\left(\epsilon_0 \frac{d \phi_E}{d t}\right) are that of :

  1. (A) electric charge
  2. (B) electric field
  3. (C) electric current
  4. (D) electric potential

Answer: (C)

Step-by-step solution

JEE Main 2024 · 4 Apr · Shift 2 · EM Spectrum

Arrange the following in the ascending order of wavelength:

A. Gamma rays (λ1)\left(\lambda_1\right)

B. xx - rays (λ2)\left(\lambda_2\right)

C. Infrared waves (λ3)\left(\lambda_3\right)

D. Microwaves (λ4)\left(\lambda_4\right)

Choose the most appropriate answer from the options given below

  1. (A)λ1<λ2<λ3<λ4\lambda_1<\lambda_2<\lambda_3<\lambda_4
  2. (B)λ2<λ1<λ4<λ3\lambda_2<\lambda_1<\lambda_4<\lambda_3
  3. (C)λ4<λ3<λ2<λ1\lambda_4<\lambda_3<\lambda_2<\lambda_1
  4. (D)λ4<λ3<λ1<λ2\lambda_4<\lambda_3<\lambda_1<\lambda_2

Answer: (A)

Step-by-step solution

JEE Main 2023 · 13 Apr · Shift 1 · Maxwell's Equations

Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions :

  1. (A)∮E→⋅dl→=0\oint \overrightarrow{\mathrm{E}} \cdot \overrightarrow{d l}=0
  2. (B)∮B⃗⋅dl→=μ0I\oint \vec{B} \cdot \overrightarrow{d l}=\mu_{0} I
  3. (C)∮E⃗⋅dl→=−∂ϕB∂t\oint \vec{E} \cdot \overrightarrow{d l}=-\frac{\partial \phi_{B}}{\partial t}
  4. (D)∮D⃗⋅dA→=Q\oint \vec{D} \cdot \overrightarrow{d A}=Q

Answer: (C)

Step-by-step solution

JEE Main 2023 · 12 Apr · Shift 1 · Electromagnetic Spectrum

Given below are two statements: one is labelled as Assertion A\mathbf{A} and the other is labelled as Reason R\mathbf{R}

Assertion A : EM waves used for optical communication have longer wavelengths than that of microwave, employed in Radar technology.

Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar)

In the light of given statements, choose the correct answer from the options given below.

  1. (A)Both A\mathrm{A} and R\mathrm{R} are true but R\mathrm{R} is NOT the correct explanation of A\mathrm{A}
  2. (B)A\mathrm{A} is true but R\mathrm{R} is false
  3. (C)Both A\mathrm{A} and R\mathrm{R} are true and r\mathrm{r} is the correct explanation of A\mathrm{A}
  4. (D)A\mathrm{A} is false but R\mathrm{R} is true

Answer: (D)

Step-by-step solution

All 101 questions are in the free PDF above, grouped by topic.

Frequently asked

How many questions come from Electromagnetic Waves in JEE Main?

101 questions from 2020 to 2025, about 17 per year. In 2025 it had 12.

Which Electromagnetic Waves topics are most important for JEE Main?

By past papers: Properties of EM Waves (83%), Displacement Current (7%) and EM Spectrum (6%) of all Electromagnetic Waves questions.

Is the Electromagnetic Waves PYQ PDF free?

Yes. The PDF, the answer key and every step-by-step solution on PrepWiser are free, with no login needed to practise.

More Physics chapters

JEE Main PYQs by year: 2025 · 2024 · 2023 · 2022 · 2021 · 2020

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