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A photographic flash unit consists of a ...

A photographic flash unit consists of a xenon-filled tube. It givers a flash of average power `2000 W` for `0.04 s. The flash is due to discharge of a fully charged capacitor of `40 muF` The valtage to which it is charged before a flash is given by The unit is .

A

`1500 V`

B

`2000 V`

C

`2500 V`

D

`3000 V`

Text Solution

Verified by Experts

The correct Answer is:
B
`2000xx0.04=1/2xx40xx10^(-6)V^(2)`
or `V^(2)=4xx10^(-6)` or `V=2000 V`.
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