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In India electricity is supplied for dom...

In India electricity is supplied for domestic use at `220 V`. It is supplied at `110 V` in USA. If the resistance of a `60 W` bulb for use in India is `R`, the resistance of a `60 W` bulb for use in USA will be

A

`2R`

B

`R/4`

C

`R/2`

D

`R`

Text Solution

Verified by Experts

For P = constant
`R prop V ^(2)`
`therefore R _(1) = ( R xx (110) ^(2))/( (220 ) ^(2)) = ( R)/(4)`
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