JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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Application +4 | -1

In a plane electromagnetic wave, the electric field varies with time having an amplitude

1 \mathrm{~Vm}^{-1}

. The frequency of wave is

0.5 \times 10^{15} \mathrm{~Hz}

. The wave is propagating along

z

-axis. What is the average amplitude of magnetic field?

View answer and explanation

Correct option: A

3.33 \times 10^{-9} \mathrm{~T}

Option A (

3.33 \times 10^{-9} \mathrm{~T}

) is correct because it is calculated using the relationship between the electric field amplitude and the magnetic field amplitude in an electromagnetic wave,

B_0 = E_0/c

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