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A charge of 40 mu C is given t...

A charge of 40 ` mu C ` is given to a capacitor having capacitance C = `10 mu F `. The stored energy in ergs is

A

`80 xx10^(-6) `

B

800

C

80

D

8000

Text Solution

Verified by Experts

The correct Answer is:
B
`U=Q^2/(2C)=(40 xx40 xx10^(-12))/(2xx10xx10^(-6))`
`=80xx10^(-6)J`
U (inerg) `=80 xx10^(-6) xx10^7 ` erg
= 800 erg.
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