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>>EMF, Terminal Voltage and Internal Resistance and Problems on It
>> $The e.m.f of a cell is 2.0 V and the int$

Question

The e.m.f of a cell is $2.0 V$ and the internal resistance is $0.1 Ω$ . It is connected with a resistance of $3.9 Ω$ . Then potential difference across the cell is :-

A

$0.20 V$

B

$1.90 V$

C

$1.95 V$

D

$2.00 V$

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Updated on : 2022-09-05

Solution

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Correct option is C)

Current in the circuit is $i = \frac{2}{3 . 9 + 0 . 1} = 0.5 A$

Potential across cell $=$ emf of cell $-$ potential across internal resistance $= 2 - (0.1 \times 0.5) = 1.95 V$

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