An alternating voltage $V = 140 \sin 100 πt$ is connected across a pure resistor of resistance 40 Ω. What is the rms current through the resistor? (Take $\sqrt{2} = 1.4$)

3.5 A 2.5 A 4.9 A 0.1 A

2.5 A

The correct answer is Option (2) → 2.5 A