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(a) A current of 1 A flows in a series c...

(a) A current of `1 A` flows in a series curcuit containing an electric lamp and a conductor of `5 Omega` when connected to a `10 V` battery. Calculate the resistance of the electric lamp.
(b) Now if a resistance of `10 Omega` is connected in parallel with this series combination, what change (if any) in current flowing through `5 Omega` conductor and potential difference across the lamp will take place ? Give reason.

Text Solution

Verified by Experts

Total current in the circuit , R=V/I
=10/1= `10 Omega`
Since `5Omega` and lamp are in series,
So `R_"lamp"=10Omega -5Omega =5Omega` (1)
P.d across lamp = I
`R_"lamp"=1Axx5Omega`=5 V
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