Question

Calculate the current flowing through a wire of resistance 7.5 Ω connected to a battery of potential difference 1.5 V.

• A. $0.1A$
• B. $0.2A$
• C. $0.3A$
• D. $0.4A$

Answer 1

The correct option is B

$0.2A$

Given, the resistance of wire $R=7.5\Omega$ and the potential difference $V=1.5V$.

Let the current be $I$.

By Ohm's law, $V=IR$

On substituting the values, $I=\frac{V}{R}=\frac{1.5}{7.5}=0.2A$.

Therefore, the current through a wire is $0.2A$.