Question

A coil of inductance 2H and resistance 10 ohm is connected across a battery of 100 V alond with a key . At time t=0 the key is closed find the current in the circuit at t=1sec? Kindly answer sir/mam.

Answer 1

d= volume of the oil drop/ area of the film

 

= 4/3 *pi* (0.025cm)^3/(pi* (10 cm)^2

 

= 2.08X10^-7 cm