NEET | 2017Magnetic field due to currentHard

Question

n an electromagnetic wave in free space the root mean square value of the electric field is Erms = 6V/m. The peak value of the magnetic field is :-

Options

A.

2.83 ×10-8 T

B.

0.70 × 10-8 T

C.

4.23 × 10-8 T

D.

1.41 ×10-8 T

Solution

E0 = CB0
Erms = E02
⇒Erms=2=CB0
⇒B0 =Erms2C=6×23 ×108=2.83×10-8 T

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