Question

QUESTION 20 What is the amplitude of the magnetic field B in an electromagnetic wave that has the amplitude of the electric field of E= 1000 V/m? Define the speed of light in vacuum as C. Note that C = E/B. Assume that this electromagnetic wave propagates in vacuum. The amplitude of the magnetic field B is: OA. 1.50 10-6 (T): OB.3.33 x 10-6 m); O c.6.67 x 10-6 (1); OD. 1.50 x 10-5 (T): O E.2.50 x 10-5 (T).

Answer 1

As given

Electric field = 1000 v/m

Velocity of light = 3*10^ 8 m/s

Aa we know

Magnetic field = electric field/ Velocity of light

= 1000/(3*10^8)

= 3.33*10^-6 T

So B option is correct.

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