Question 135: EM waves

Question

A plane electromagnetic wave travels in free
space along the x-direction. The electric field
component of the wave at a particular point of
space and time is E = 6 V m–1 along y-direction.
Its corresponding magnetic field component,
B would be :

Accepted Answer

The direction of propagation of an EM wave is direction of $$\overrightarrow E  	imes \overrightarrow B $$
$$\widehat i = \widehat j 	imes \widehat B$$
$$ \Rightarrow \widehat B = \widehat k$$
$$C = {E \over B} \Rightarrow B = {E \over C} = {6 \over {3 	imes {{10}^8}}}$$
B = 2 ÃÂ 10
Ã¢ÂÂ8
T along z direction.

Answer

2 × 10–8 T along y-direction

Answer

6 × 10–8 T along z-direction

Answer

2 × 10–8 T along z-direction

Answer

6 × 10–8 T along x-direction

EM waves

A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time is E = 6 V m–1 along y-direction. Its corresponding magnetic field component, B would be :

Choose the correct answer: