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Non-Ideal Battery

Consider two ...

Question

Consider two identical galvanometers are two identical resistors with resistance $R$ . If the internal resistance of the galvanometers $R_{C} < R / 2$ , which of the following statement(s) about any one of the galvanometers is(are) true?

The maximum voltage range is obtained when all the components are connected in series

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The maximum voltage range is obtained when the two resistors and one galvanometer are connected in series, and the second galvanometer is connected in parallel to the first galvanometer

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The maximum current range is obtained when all the components are connected in parallel

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The maximum current range is obtained when the two galvanometers are connected in series and the combination in parallel with both the resistors

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Solution

The correct options are
A The maximum voltage range is obtained when all the components are connected in series
D The maximum current range is obtained when all the components are connected in parallel
For maximum voltage,

$V_{m a x} = I (R_{g} + S_{e q .})$

This would happen when all components are in series.

For maximum current,

$S_{e q .}$ will be Parallel combination of two shunt and one galvanometer since in that case max current would flow through $R_{g}$

Answer is A and C options.

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Consider two identical galvanometers are two identical resistors with resistance R. If the internal resistance of the galvanometers RC<R/2, which of the following statement(s) about any one of the galvanometers is(are) true?

Consider two identical galvanometers are two identical resistors with resistance $R$ . If the internal resistance of the galvanometers $R_{C} < R / 2$ , which of the following statement(s) about any one of the galvanometers is(are) true?