Question

The rms value, of the saw tooth alternating voltage, shown here, equals (nearly) 

(1) 1.732 Volt

(2) 1.00 Vol

(3) 1.15 Volt

(4) 1.42 Volt

Answer 1

(3) 1.15 Volt

The rms value, by definition, is obtained by taking the average of the squares of all values (over one complete cycle) and then taking the square root of this average.

We see that for the time period of the alternating voltage is 4V.

For (t = 0) to (t = 2), we have v (t) = 1xt (slope = 1)

∴ Sum of the squares of all values over one complete cycle