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When an ammeter of negligible internal r...

When an ammeter of negligible internal resistance is inserted in series with circuit, it reads `1 A`. When a voltmeter of very large resistance is connected across `R_(1)`, it reads `3 V`. But when the points `A` and `B` are short-circuited by a conducting wire, then the voltmetre measures `10.5 V` across the battery. The internal resistance of the battery is equal to

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When an ammter of negligible internal resistance is inserted in series with circuit it reads 1 A When the voltmeter of very large resistance is connected across X it reads 1 V . When the point A and B are shorted by a conducting wire, the voltmeter meausres 10 V across the battery. The internal resistance of the battery is equal to

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