11.The time constant of a series R-C circuit is given by

12.The ratio of active power to apparent power is known as factor.

13.The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is

14.The safest value of current the human body can carry for more than 3 second is

15.Time constant of a circuit is the time in seconds taken after the application of voltage to each