The r.m.s. value of potential difference V shown in the figure is:
V₀
V₀/√2
V₀/2
V₀/√3
Correct answer: V₀/√2
Solution
The r.m.s. (root mean square) value of an alternating voltage is given by V_rms = V₀/√2, where V₀ is the peak value of the voltage. This is a standard result derived from the definition of r.m.s. for sinusoidal waveforms.