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Non-Ideal Battery

A voltmeter i...

Question

A voltmeter is connected across a battery of emf 12.0 V and internal resistance of 10 $Ω$ . If the voltmeter resistance is 230 $Ω$ , what reading will be shown by voltmeter?

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Solution

Since V is directly proportional to R in series therefore reading will be $\frac{230}{240} \times 12 = \frac{23}{2} = 11.5 V$

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