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Physics-

General

Easy

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 $stack E with minus on top equals 6.3 stack j with hat on top$ The magnetic field $stack B with minus on top$ at this point is

$4.2 \times 10^{- 8} \hat{k} T$
$2.1 \times 10^{- 8} \hat{k} T$
$18.9 \times 10^{8} \hat{k} T$
$2.1 \times 10^{8} \hat{k} T$

The correct answer is: $2.1 cross times 10 to the power of negative 8 end exponent stack k with hat on top T$

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