EASY
12th West Bengal Board
IMPORTANT
Earn 100

Why the use of a.c voltage is preferred over d.c.voltage?

Important Questions on Transient Current and Alternating Current

MEDIUM
12th West Bengal Board
IMPORTANT
The power factor of an L-R circu it is 13. If the frequency of ac be doubled, what will be the power factor? 
MEDIUM
12th West Bengal Board
IMPORTANT
An a.c. source generating voltage e=e0sinωt is connected to a capacitor of capacitance C. Find the expression for the current i flowing through it. Plot a graph of  e and i versus ωt.