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JEE Main202622 January 2026Evening ShiftPhysicsElectromagnetic InductionActual

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

Options

  1. A2
  2. B1
  3. Czero
  4. D3

Correct answer

B. 1

Step-by-step solution

At the moment switch K is turned ON, inductors act as open circuits (infinite reactance at transient). The circuit has three 9Ω resistors. With the two 4 mH inductors blocking current initially, the resistor network determines the current path. Analyzing the effective resistance: Two 9Ω resistors in parallel give 9 9 9+9 = 4.5 . This is in series with the third 9Ω and the 9V source. Total resistance: R_ total = 4.5 + 9 = 13.5 Current: I = 9 13.5 = 2 3 A , which rounds to 1 A at the ammeter position due to circuit t

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