The r.m.s value of a supply voltage is quoted at 200v. What is the approximate peak value of the voltage?

A. 200volts
B. 300volts
C. 283volts
D. 250volts

Correct Answer:

Option C – 283volts

Explanation

Vr.m.s = V0 ÷ V2, where Vr.m.s rep. to as voltage root –square mean, v = peak voltage

Vr.m.s = 200volt, v = ?

200 = V0 ÷ V2

V0 = 200v2

= 200 × 1.414

= 282.8 volts V0 = b &approx.; 283 volts