Question

If a P.D. of 12V is applied across a $3\Omega$ resistor, then the current passing through it is _____.

• A. 36 A
• B. 4 A
• C. 0.25 A
• D. 15 A

Answer 1

The correct option is B 4 A

$V=IR$

$I=\frac{V}{R}=\frac{12}{3}=4A$