The potential difference across the terminals of an non-ideal ammeter in an electrical circuit will be

small

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large

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Infinity

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zero

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Solution

The correct option is A small
$∵ S <<< G$
$p . d . = (i - i_{g}) s$
$∴ p . d .$ will be small

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Similar questions

A cell of e.m.f. 2 V and internal resistance $1.2 Ω$ is connected to an ammeter of resistance $0.8 Ω$ and two resistors of $4.5 Ω$ and $9 Ω$ as shown in the figure.
Find:
(a) the reading of the ammeter,
(b) the potential difference across the terminals of the cell, and
(c) the potential difference across the $4.5 Ω$ resistor.

Question 22
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 $Ω$ in series with a combination of two resistors (4 $Ω$ each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 $Ω$ resistors be the same as that across the parallel combination of 4 $Ω$ resistors? Give reason.