NEET UG PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Easy

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Application +4 | -1

The sun delivers

{10^3}\,W/{m^2}

of electromagnetic flux to the earth’s surface. Find the total power that is incident on a roof of dimensions

8\,m \times 20\,m

and the radiation force on the roof is given by

5.33 \times {10^{ - 4}}N

View answer and explanation

Correct option: C

1.6 \times {10^5}\mathrm{ watt}

Option C (

1.6 \times {10^5}\mathrm{ watt}

) is correct because the total power is the product of the intensity and the area of the roof.

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E = 50\sin \,(500x - 10 \times {10^{10}}t)\,v/m.

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\sqrt {\frac{\mathrm{\mu }}{\mathrm{\varepsilon }}}