First slide

Electromagnetic waves and its nature

Question

In a travelling plane electromagnetic wave the maximum magnetic fields is $2.52 \times 10^{- 4} T$ . The intensity of the wave is (Assume , $μ_{0} = 1.26 \times 10^{- 6} H / m$ )

Moderate

A

$4.6 \times 10^{6} W / m^{2}$
B

$7.56 \times 10^{6} W / m^{2}$
C

$3.78 \times 10^{6} W / m^{2}$
D

$6.4 \times 10^{6} W / m^{2}$

Solution

Intensity of electromagnetic wave in terms of magnetic field is $I = \frac{1}{2} \frac{B_{0}^{2}}{μ_{0}} C$
$I = \frac{1}{2} \times \frac{2.52 \times 10^{- 4} \times 2.52 \times 10^{- 4} \times 3 \times 10^{8}}{1.26 \times 10^{- 6}} I = 7.56 \times 10^{6} W / m^{2}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App