JEE Main & Advanced
Physics
Electro Magnetic Induction
Question Bank
Static EMI
question_answer
A solenoid has an inductance of 60 henrys and a resistance of 30 ohms. If it is connected to a 100 volt battery, how long will it take for the current to reach \[\frac{e-1}{e}\approx 63.2%\] of its final value [MP PET 2000]