Question

If the reading of the Ideal voltameter (V) in the given circuit is 6V, then find the reading of the ammeter (A).

Answer 1

Given: a circuit, where the reading of the Ideal voltameter (V) is 6V

To find the reading of the ammeter (A).

Solution:

The current in the resistor $15\Omega$can be found using the Ohm's law,

$I=\frac{V}{R}⟹I=\frac{6}{15}⟹I=0.4A$

The 2 $10\Omega$ resistors are in parallel, so there equivalent resistance will be,

$R_P=\frac{10\times 10}{10+10}⟹R_P=\frac{100}{20}⟹R_P=5\Omega$

Now $R_P$ and $15\Omega$ are in series.

As we know same current flows through a series circuit, so the reading of the ammeter is $0.4A$