Ncert Exercises & Solutions

Question 7.2 :

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

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

(a) Peak voltage of the ac supply, $V_{0}$ = 300 $V_{rms}$ voltage is given as:

$V = \frac{V_{o}}{\sqrt{2}} = \frac{300}{\sqrt{2}} = 212.1 V$

(b) The rms value of the current is given as: 1 = 10 A

Now, the peak current is given as: $I_{o} = \sqrt{2} I = \sqrt{2} \times 10 = 14.1 A$