JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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Application +4 | -1

A cylindrical region of radius

1.2 \mathrm{~m}

is containing a uniform electric field that is increasing uniformly with time. At

\mathrm{t}=0

the field is zero and at

\mathrm{t}=5.0 \mathrm{~s}

the field is

200 \mathrm{~V} / \mathrm{m}.

The total displacement current through a cross section of the region is:

View answer and explanation

Correct option: D

1.6 \times 10^{-9} \mathrm{~A}

Option D (

1.6 \times 10^{-9} \mathrm{~A}

) is correct because the displacement current is calculated using the formula

i_d =\varepsilon_0 \frac{d \phi_E}{d t} = \varepsilon_0 {A} \frac{d E}{d t}

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