JEE Main 2022 · 30 June · morning · Single correct · +4 / −1

An expression for oscillating electric field in a plane electromagnetic wave is given as E z = 300 sin(5π × 10³x - 3π × 10¹¹t) Vm⁻¹
Then, the value of magnetic field amplitude will be :
(Given : speed of light in Vacuum c = 3 × 10⁸ ms⁻¹)

  1. (a) 1 × 10⁻⁶ T
  2. (b) 5 × 10⁻⁶ T
  3. (c) 18 × 10⁹ T
  4. (d) 21 × 10⁹ T
Answer and solution

Answer (b) 5 × 10⁻⁶ T

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Asked about 130 times in JEE Main since 2020. This question is from 2022.