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A parallel plate capacitor is made of tw...

A parallel plate capacitor is made of two circular plates separated by a distance 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is `3xx10^4V//m` the charge density of the positive plate will be close to:

A

`6xx10^(-7)C//m^(2)`

B

`3xx10^(-7)C//m^(2)`

C

`3xx10^(4)C//m^(2)`

D

`6xx10^(4)C//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`d=5xx10^(-3)m, k=2.2, E=3xx10^(4)V//m`
`E=(sigma)/(kepsilon_(0))impliessigma=3xx10^(4)xx2.2xx8.85xx10^(-12)`
`=5.8xx10^(-7)C//m^(2)`
`~~6xx10^(-7)C//m^(2)`.
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