Question

In the figure shown, an ammeter A and a resistor of 4 Ω are connected to the terminals of the source. The emf of the source is 12 V having an internal resistance of 2 Ω. Calculate the voltmeter and ammeter readings.

Answer 1

Considering voltmeter and ammeter to be ideal. Then

Ammeter reading will be,

`I = 12/(4 + 2)`

`= 2 A`

Voltmeter reading will be,

V = 12 − I × 2

= 12 − 2 × 2

=8 V