Question

For the circuits shown in figures I and II, the ammeter readings would be________.

• A. 0A in Circuit I and 1A in Circuit II
• B. 1A in both Circuits
• C. 0A in both Circuits
• D. 1A in Circuit I and 0A in Circuit II

Answer 1

The correct option is D

1A in Circuit I and 0A in Circuit II

Given:
Applied voltage in the circuit V = 5 V
Resistance of the circuit $R=5\Omega$
According to Ohm's law $V=IR$
or $I=\frac{V}{R}$
$I=\frac{5}{5}=1ampere$
1 A current is flowing in the circuit $I$ thus the ammeter will show $1ampere$ rating.
No current is flowing in the circuit $II$ as the plug key is not connected thus ammeter will show $0A$ in Circuit $II$.