Question

1. The peak voltage of an ac supply is 300V. What is the rms voltage?

2. The rms value of current in an ac circuit is 10A. What is the peak current?

Answer 1

1. Given E₀ = 300 V, E_av  = ?

Since E_v = \(\frac{E_0}{\sqrt{2}}\) = 0.707 × 300

or E_v = 212.1 V.

2. Given I_v = 10A, I₀ = ?

Since I₀ = \(\sqrt{2}\)E_v = 1.414 × 10

or I = 14.14 A.