STANDARDPhysics-Electromagnetic Waves

STANDARD Physics Wave Propagation MCQ Question

Type: MCQ-numerical-Medium-Class 12

A plane electromagnetic wave of frequency 25 MHz travels in free space along x-direction. At a particular point in space and time, electric field E = 6.3 V m⁻¹. The magnitude of magnetic field B at this point is

A

1.2 × 10⁻⁶ T

B

1.2 × 10⁻⁸ T

C

2.1 × 10⁻⁶ T

D

2.1 × 10⁻⁸ T

Correct Answer

Option D

Detailed Explanation

As B = E/c = 6.3/3 × 10⁸ = 2.1 × 10⁻⁸ T.

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