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A 50V battery is connected across a 10 o...

A `50V` battery is connected across a 10 ohm resistor. The current is `4.5` amperes. The internal resistance of the battery is

A

Zero

B

0.5 ohm

C

1.1 ohm

D

5.0 ohm

Text Solution

Verified by Experts

The correct Answer is:
C
`I = E/(R + r) rArr 4.5 = 50/(10 + r) rArr 45 + 4.5 r = 50`
`rArr r = 5/4.5 = 1.1 Omega`
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