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A parallel plate capacitor has a capacit...

A parallel plate capacitor has a capacity C. The separation between plates is doubled and a dielectric medium is inserted between plates. The new capacity is 3C. The dielectric constant of medium is

A

1.5

B

3

C

6

D

`12.0`

Text Solution

Verified by Experts

The correct Answer is:
C
If separation between the plates is doubled then capacity of condenser becomes `C//2`.
`"Now"," "C_(m)=3C`
`"Thus"," "C_(m)=C_("air")xxk" "therefore3C=C/2xxk`
`" "thereforek=6`
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