Question

In the circuit shown in figure, ammeter and
voltmeter are ideal. If E=4V, R = 9 ohm and r= 1 ohm
then readings of ammeter and voltmeter are​

Answer 1

Readings in the voltmeter=4V

As voltmeter measures potential difference between two points, i.e., voltage.

Ammeter measures current.

Therefore we know that:

$v = ir$

=>

$i = \frac{v}{r}$

=>

$i = \frac{4v}{9ohms}$

=>

$i = \frac{4}{9}ampere$

=>

$0.44...ampere$

Therefore readings of ammeter is 0.44A