Bhautik Study

Q. A coil of inductance 1 H and resistance 100Ω is connected to a battery of 6 V. Determine approximately :

(a) The time elapsed before the current acquire half of its steady–state value

(b) The energy stored in the magnetic field associated with the coil at an instant 15 ms after the circuit is switched on.  (Given In2 = 0.693, )

(A) t = 10 ms; U = 2 mJ

(B) t = 10 ms; U = 1 mJ

(C) t = 7 ms; U = 1 mJ

(D) t = 7 ms; U = 2 mJ                    (JEE-2022)