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Q.

A 50 V battery is connected across a 10 ohm resistor. The current is 4.5A is flowing through the resistor then the internal resistance of the battery is

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a

zero

b

1.1Ω

c

5Ω

d

0.5Ω

answer is C.

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Detailed Solution

Current in the circuit should 

i = Er+R

⇒4.5=50r+10

⇒45+4.5r=50

⇒r=54.5=1.1Ω

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A 50 V battery is connected across a 10 ohm resistor. The current is 4.5A is flowing through the resistor then the internal resistance of the battery is