Figure shows the circuit that contains three resistances ($9 \Omega$ each) and two inductors (4 mH each). The reading of ammeter at the moment switch $K$ is turned ON, is ______ A.

JEE Main · 2026 · 22 Jan 2026 · Shift 2 · Electromagnetic Induction

Figure shows the circuit that contains three resistances (

9Ω

each) and two inductors (4 mH each). The reading of ammeter at the moment switch

K

is turned ON, is ______ A.

(A)1✓ Correct
(B)zero
(C)3
(D)2

Answer: (A)

Solution

The instant the switch is closed, each inductor opposes any sudden rise of current and acts momentarily as an open circuit, so the two outer branches, which both contain an inductor, carry no current. Only the middle branch, a single

9 Ω

resistor, is then connected across the

9 V

supply, and the ammeter in the main line carries just this current:

I = \frac{9}{9} = 1 A .

The ammeter reads

1 A

JEE Main · 2026 · 22 Jan 2026 · Shift 2 · Single correct option

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