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JEE Main202621 January 2026Morning ShiftPhysicsCurrent ElectricityActual

The heat generated in 1 minute between points A and B in the given circuit, when a battery of 9 V with internal resistance of 1 is connected across these points is _ _ _ _ J.

Options

  1. ABoth Statement I and Statement II are true
  2. BBoth Statement I and Statement II are false
  3. CStatement I is true but Statement II is false
  4. DStatement I is false but Statement II is true

Correct answer

D. Statement I is false but Statement II is true

Step-by-step solution

Wheatstone bridge with P = 1Ω, Q = 2Ω, R = 2Ω, S = 4Ω P Q = R S = 1 2 → Bridge is balanced, no current through middle 1Ω. R_ AB : Upper (3Ω) and Lower (6Ω) in parallel = 3 6 9 = 2Ω Total resistance = 1 + 2 = 3Ω Current I = 9 3 = 3 A Power between A and B: P = I^2 R_ AB = 9 2 = 18 W Heat in 1 min = 18 60 = 1080 J

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