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NEET2012PhysicsCurrent ElectricityActual

In the circuit shown the cells A and B have negligible resistances. For V_A=12 ~V , R₁=500 and R=100 the galvanometer (G) shows no deflection. The value of V_B is

Options

  1. A4 ~V
  2. B2 ~V
  3. C12 ~V
  4. D6 ~V

Correct answer

B. 2 ~V

Step-by-step solution

Applying Kirchhoff's law 500 I+100 I=12 So, I= 12 10⁻² 6 =2 10⁻² Hence, V_B=100 (2 10⁻² )=2 ~V

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