Question

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

• A. $2 \times 10^{- 8}T$
• B. $3 \times 10^{- 7}T$
• C. $6 \times 10^{- 8}T$
• D. $5 \times 10^{- 7}T$

Answer 1

Answer: (A)

$2 \times 10^{- 8}T$

Answer 2

: Here, $\left| \overrightarrow{E} \right| = 6V/m$

The magnitude of magnetic vector is,

$\left| \overrightarrow{B} \right| = \frac{\left| \overrightarrow{E} \right|}{c} = \frac{6V/m}{3 \times 10^{8}ms^{- 1}} = 2 \times 10^{- 8}T$