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UPSEE 2019 Solved Paper

Question : 27 of 150

Marks: +1, -0

Displacement current is caused due to

Solution:

As, displacement current,

I_{d} = \varepsilon_{0} \frac{d\phi}{dt}

......(i)

Where,

\phi =

electric flux

∵

\phi = E \cdot A

For area,

A =

constant

\therefore

d\phi = A dE

.......(ii)

From Eqs. (i) and (ii), we get

I_{d} = \varepsilon_{0} A \frac{dE}{dt}

So, time varying electric field generates the displacement current.

\therefore

Option (a) is correct.

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