The rms emf of an AC generator is 6.9 x 102 V. What is the maximum output emf? (Remember ΔVrms = 0.707Vmax) a. 98 V c. 9.8 V b. 9.75 x 102 V d. 4.88 x 102 V

The correct option is (b) 9.75 x 10^2 V

Explanation:

Since ΔVrms = 0.707*Vmax

Where ΔVrms is the potential difference (in rms) and Vmax is the maximum output emf.

Vmax = (ΔVrms/0.707)

Vmax = (6.9*10^2 / 0.707)

Vmax = 9.75 x 10^2 V (Option b)