A coil of inductance 1 H and resistance 100 is connected t…

Physics Alternating Current JEE Main 2022 MCQ (Single Correct)

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

The time elapsed before the current acquires half of its steady - state value t = 10ms; U = 2mJ

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, e- 3/2 = 0.25) t = 10 ms; U = 1 mJ

t = 7 ms; U = 1 mJ

t = 7 ms; U = 2 mJ

Text Solution

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The correct answer is:

Given circuit is R - L growth circuit

by solving

= 7ms

by solving we get U = 1 mJ.

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