Question

The value of the alternating current which is equal to the DC current that gives the same heating effect over a fixed period of time is called:

• A. Average current
• B. Peak current
• C. RMS current
• D. Peak-to-peak current

Hint:

RMS current represents the effective heating value of AC and equals \( \dfrac{I_{\text{peak}}}{\sqrt{2}} \) for sine waves.

Answer 1

The Correct Option is C

RMS (Root Mean Square) current is defined as the equivalent DC current that would produce the same thermal effect as the AC current: \[ I_{\text{rms}} = \sqrt{\dfrac{1}{T} \int_0^T i^2(t)\,dt} \]