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A primary cell has an e.m.f. of 1.5 volt...

A primary cell has an e.m.f. of 1.5 volts, when short-circuited it gives a current of 3 amperes. The internal resistance of the cell is

A

4.5 ohm

B

2 ohm

C

0.5 ohm

D

`1//4.5` ohm

Text Solution

Verified by Experts

The correct Answer is:
C
`I = E/r = 1.5/r rArr 3 = 1.5/r rArr r = 0.5 Omega`
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