Home » Alternating Current » 10 » b A sine-wave alternating current of 10 ampere peak has an rms value of:   a.   5 amp   b.   7.07 amp   c.   14.14 amp   d.   20 amp Your answer "b" is CORRECT! The RMS value of a sine-wave is 0.707 of the peak value. 0.707 x 10 = 7.07 amps. That was the last question for this topic.