In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency 2×1010Hz and amplitude 48 V/m. The amplitude of oscillating magnetic field is 16×10−x . Then value x is

Amplitude of the oscillating magnetic field B=Ec=483×108=16×10−8Wb/m2 5

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In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency $2 \times 10^{10} H z$ and amplitude 48 V/m. The amplitude of oscillating magnetic field is $16 \times 10^{- x}$ . Then value $x$ is

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Amplitude of the oscillating magnetic field
$B = \frac{E}{c} = \frac{48}{3 \times 10^{8}} = 16 \times 10^{- 8} W b / m^{2}$ 5

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