CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 1 · Question Q18

If the equation of an a.c voltage is V = 200 \sin 50\pi t, then the r.m.s. value of the voltage is

1. (A)70.7\text{ V}
2. (B)141\text{ V}
3. (C)200\text{ V}
4. (D)282\text{ V}