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Three 60 W light bulbs are mistakenly wi...

Three `60 W` light bulbs are mistakenly wired in series and connected to a `120V` power supply. Assume the light bulbs are rated for single connection to `120V`. With the mistaken connection, the power dissipated by each bulb is:

A

`6.7 W`

B

`13.3 W`

C

`20 W`

D

`40 W`

Text Solution

Verified by Experts

The correct Answer is:
A
`P=(V^(2))/Rimplies(P')/P=((V')/V)_(1)^(2)`
`P'=60(40/120)^(2)=60/9=6.67 W`
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