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Question

Physics Question on Electromagnetic waves

An electromagnetic wave is propagating along x−axisx-axis. At x=1 mx = 1 \,m and t=10 st = 10\, s, its electric vector ∣E⃗∣=6 V/m| \vec{E} | = 6\, V/ m then the magnitude of its magnetic vector is

A

2×10−8T2 \times 10^{-8}T

B

3×10−7T3 \times 10^{-7}T

C

6×10−8T6 \times 10^{-8}T

D

5×10−7T5 \times 10^{-7}T

Answer

2×10−8T2 \times 10^{-8}T

Explanation

Solution

The magnitude of its magnetic vector
B=EcB = \frac{E}{c}
=63×108=2×10−8= \frac{6}{3\times 10^8} = 2 \times 10^{-8}