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BITSAT2020PhysicsCurrent ElectricityActual

Determine the current in 2 resistor.

Options

  1. A1 ~A
  2. B1.5 ~A
  3. C0.9 ~A
  4. D0.6 ~A

Correct answer

C. 0.9 ~A

Step-by-step solution

At steady state the capacitor will be fully charged and thus there will be no current in the 1 resistance. So the effective circuit becomes Net current from the 6 ~V battery, I= 6 ( 2 3 2+3 )+ 2.8 1 = 6 1.2+2.8 = 3 2 =1.5 ~A Between A and B , voltage is same in both resistances, 2 I ₁=3 I ₂ where I ₁+ I ₂= I =1.5 2 I ₁=3 (1.5- I ₁ ) I ₁=0.9 ~A

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