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Question

An electromagnetic wave is propagating along x-axis. At x=1cm and t=10s, its electric vector |E|=6V/m, then the magnitude of its magnetic vector is


A

2×10-8T

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B

3×10-7T

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C

6×10-8T

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D

5×10-7T

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Solution

The correct option is A

2×10-8T


Step 1. Given data:

|E|=6V/m, Magnitude of electric vector

c=3×108ms

|B|=?, Magnitude of magnetic vector

Step 2. Calculating magnitude of magnetic vector,

Electric and magnetic fields are related by,

|B|=|E|c|B|=63×108|B|=2×10-8T

Hence, correct option is (A).


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