This question was previously asked in

ISRO (VSSC) Technician (Electrician) Sept 2016 Official Paper

Option 2 : 0.707 of max. value

Subject Test 1: Electrical Basics

3257

20 Questions
80 Marks
30 Mins

**RMS Value:**

- The root mean square current /voltage (rms) of an AC circuit is the effective current/voltage of that circuit.
- The maximum value of the potential in an Ac circuit is called the peak value of voltage.
- The average value of the potential and current of an AC circuit for a cycle is called average potential and average current.

\(Average\;current\;over\;half\;cycle\;\left( {{I_{avg}}} \right) = \frac{{2\;I}}{\pi }\)

Average current over complete cycle = 0

\(rms\;current\;\left( {{I_{rms}}} \right) = \frac{I}{{\sqrt 2 }}\)

Where I is maximum/peak current in the circuit.

**So, RMS value of A.C is equal to 0.707 of max. value.**