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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Easy

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Application +4 | -1

An electromagnetic wave has electric field given by

\vec{E}=(9.6 \hat{j}) \sin \left[2 \pi\left\{30 \times 10^6 t-\frac{1}{10} x\right\}\right], x

and

t

are in SI units. The maximum magnetic field is

View answer and explanation

Correct option: A

3.2 \times 10^{-9}

Option A (

3.2 \times 10^{-9}

) is incorrect. The correct answer is

3.2 \times 10^{-8}

because the maximum magnetic field is found using

B = \frac{E}{c}

.

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