A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time, E=6.3 hatj V / m. At this point B is equal to

Question

A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time, E=6.3 hatj V / m. At this point B is equal to (A) 8.33 × 10-8 hat k T (B) 18.9 × 10-8 hat k T (C) 2.1 × 10-8 hatk T (D) 2.1 × 108 hatk T

Tardigrade Admin · Accepted Answer

c=(E/B) Magnetic field, B=(E/c) =(6.3/3× 108) = 2.1× 10-8

Q. A plane electromagnetic wave of frequency $25 M Hz$ travels in free space along the $x$ -direction. At a particular point in space and time, $E = 6.3 \hat{j} V / m$ . At this point $B$ is equal to

$8.33 \times 1 0^{- 8} \hat{k} T$

$18.9 \times 1 0^{- 8} \hat{k} T$

$2.1 \times 1 0^{- 8} \hat{k} T$

$2.1 \times 1 0^{8} \hat{k} T$

$c = \frac{E}{B}$
Magnetic field, $B = \frac{E}{c}$
$= \frac{6.3}{3 \times 1 0 ^{8}}$
$= 2.1 \times 1 0^{- 8}$

Q. A plane electromagnetic wave of frequency 25MHz travels in free space along the x-direction. At a particular point in space and time, E=6.3j^​V/m. At this point B is equal to

8.33×10−8k^T

18.9×10−8k^T

2.1×10−8k^T

2.1×108k^T