1.

The three light bulbs in the circuit below are identical, and the battery has zero internal resistance, When switch S is closed to cause buil 1 to light, which of the ther two bulbs increase (s) in brightness ?

Answer»

<P>Neither bulb
Bulb 2 only
Bulb 3 only
Both BULBS

Solution :
Oldsituation
`P_(2)=((epsi)/(2))^(2)1/R=(epsi^(2))/(4R)`
`P_(3)=((epsi)/(2))^(2)1/R=(epsi^(2))/(4R)`

NEWSITUATION
`P_(2)` wil be lasser than `(epsi^(2))/(4R)`
`P_(3)` will be more than `(epsi^(2))/(4R)`


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