JEE Physics

Characteristics of EM Waves: JEE Questions & Solutions

36 previous-year JEE Physics questions on Characteristics of EM Waves, each with a worked step-by-step solution.

Intermediate

Previous-year questions

  1. 01The electric field in a plane electromagnetic wave is given by: E_y = 69 sin[0.6 × 10³ x - 1.8 × 10¹¹ t] V/m. The expression for magnetic…MCQEasyJEE 2026
  2. 02The electric field of a plane electromagnetic wave, travelling in an unknown non-magnetic medium is given by, E_y = 20 sin (3 × 10⁶ x - 4.5…NVAEasyJEE 2026
  3. 03A laser beam has intensity of 4.0×10¹⁴ W/m². The amplitude of magnetic field associated with the beam is T. (Take ε₀=8.85×10⁻¹² C²/N m² and…MCQEasyJEE 2026
  4. 04The equation of the electric field of an electromagnetic wave propagating through free space is given by: E = √377 sin(6.27 × 10³ t - 2.09…NVAEasyJEE 2026
  5. 05The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k = 3 and permeability of μ = 2μ₀, is (μ₀ =…MCQEasyJEE 2026
  6. 06The electric field of an electromagnetic wave travelling through a medium is given by E(x,t)=25sin(2×10¹⁵t-10⁷x) n. Then the refractive…MCQEasyJEE 2026
  7. 07A plane electromagnetic wave is moving in free space with velocity c=3×10⁸ m/s and its electric field is given as E = 54sin(kz-ω t) j V/m,…MCQEasyJEE 2026
  8. 08The electric field of an electromagnetic wave in free space is E = 57 cos [7.5 × 10⁶ t - 5 × 10⁻³ (3x + 4y)] ( 4i - 3j) N/C. The associated…MCQMediumJEE 2025
  9. 09A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the…MCQEasyJEE 2025
  10. 10Due to presence of an em-wave whose electric component is given by E = 100 sin(ω t - kx) NC⁻¹, a cylinder of length 200 cm holds certain…MCQEasyJEE 2025
  11. 11The magnetic field of an E.M. wave is given by: B = ( √3/2 i + 1/2 j) 30 sin ( ω ( t - z/c)) The corresponding electric field in S.I. units…MCQMediumJEE 2025
  12. 12Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Electromagnetic…MCQEasyJEE 2025
  13. 13A plane electromagnetic wave propagates along the +x direction in free space. The components of the electric field E and magnetic field B…MCQEasyJEE 2025
  14. 14The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2 m away from it, is:MCQEasyJEE 2025
  15. 15If an optical medium possesses a relative permeability of 10/π and relative permittivity of 1/0.0885, then the velocity of light is greater…NVAEasyJEE 2025
  16. 16The unit of √(2I/(ε₀ c)) is: (Where I is the intensity of an electromagnetic wave, and c is the speed of light)MCQEasyJEE 2025
  17. 17A plane electromagnetic wave of frequency 35 MHz travels in free space along the X-direction. At a particular point (in space and time), E…MCQEasyJEE 2024
  18. 18The electric field of an electromagnetic wave in free space is represented as E = E₀ cos(ω t - kz) i. The corresponding magnetic induction…MCQEasyJEE 2024
  19. 19In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 5 × 10¹⁰ Hz and an amplitude of 50 V/m. The…MCQEasyJEE 2024
  20. 20The magnetic field in a plane electromagnetic wave is: B_y = (3.5 × 10⁻⁷) sin(1.5 × 10³ x + 0.5 × 10¹¹ t) T. The corresponding electric…MCQEasyJEE 2024
  21. 21If E represents the electric field vector and K the propagation vector of electromagnetic waves in vacuum, then the magnetic field vector…MCQEasyJEE 2023
  22. 22The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by: Eₓ = E₀ sin (kz - ω t)…MCQEasyJEE 2023
  23. 23An electromagnetic wave is transporting energy in the negative z-direction. At a certain point and certain time, the direction of the…MCQEasyJEE 2023
  24. 24Which of the following are true? A. Speed of light in vacuum depends on the direction of propagation. B. Speed of light in a medium is…MCQEasyJEE 2023
  25. 25Given below are two statements: Statement I: Electromagnetic waves are not deflected by electric and magnetic fields. Statement II: The…MCQEasyJEE 2023
  26. 26A small object at rest absorbs a light pulse of power 20 mW and duration 300 ns. Assuming speed of light as 3 × 10⁸ m/s, the momentum of…MCQEasyJEE 2023
  27. 27A point source of 100 W emits light with 5% efficiency. At a distance of 5 m from the source, the intensity produced by the electric field…MCQEasyJEE 2023
  28. 28In a medium, the speed of light wave decreases to 0.2 times its speed in free space. The ratio of relative permittivity to the refractive…NVAEasyJEE 2023
  29. 29The ratio of average electric energy density and total average energy density of electromagnetic wave is:MCQEasyJEE 2023
  30. 30For the plane electromagnetic wave given by E = E₀ sin(ω t - kx) and B = B₀ sin(ω t - kx), the ratio of average electric energy density to…MCQEasyJEE 2023
  31. 31The energy density associated with electric field E and magnetic field B of an electromagnetic wave in free space is given by ε₀ -…MCQEasyJEE 2023
  32. 32The energy of an electromagnetic wave contained in a small volume oscillates with:MCQEasyJEE 2023
  33. 33The amplitude of magnetic field in an electromagnetic wave propagating along y-axis is 6.0 × 10⁻⁷ T. The maximum value of electric field in…MCQEasyJEE 2023
  34. 34The electric field in an electromagnetic wave is given as E = 20 sin ( ω t - x/c) j N/C where ω and c are angular frequency and velocity of…MCQEasyJEE 2023
  35. 35A plane electromagnetic wave of frequency 20 MHz propagates in free space along x-direction. At a particular space and time, E = 6.6 j v/m.…MCQEasyJEE 2023
  36. 36In an electromagnetic wave, at an instant and at a particular position, the electric field is along the negative z axis and magnetic field…MCQEasyJEE 2023

Frequently asked questions

Our bank has 36 previous-year JEE Physics questions tagged to Characteristics of EM Waves, drawn from JEE papers between 2023 and 2026, including 7 from 2026 alone. Each comes with a full step-by-step solution.

Characteristics of EM Waves is rated Intermediate overall for JEE Physics. The PYQs on this page break down as 34 easy, 2 medium.

Of the 36 previous-year questions on Characteristics of EM Waves, 32 are multiple-choice (MCQ) and 4 are numerical-value (NVA) questions.

Based on recent paper analysis, Characteristics of EM Waves is worth about 2 marks in JEE Main. It sits in Electromagnetic Waves, a Class 12 Physics chapter.

More Electromagnetic Waves topics

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