Two identical cells each of emf epsilon,...

Two identical cells each of emf `epsilon`, having negligible internal reistance r, are connercted in parallel with each other across an external resistance R. What is the current through this resistance.

A

`R=r//2`

B

`R=r`

C

`R=r//3`

D

`R=2r`

Text Solution

Verified by Experts

The correct Answer is:

A

From maximum power theorem, internal resistance = external resistance
`therefore (r )/(2)=R` [`because` Two cells are in parallel]

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