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NEET 2012
Exam
NEET
Year
2012
Subject
Physics
Chapter
Current Electricity

NEET 2012 · Physics · Current Electricity

In the circuit shown the cells A and B have negligible resistances....

In the circuit shown the cells AA and BB have negligible resistances. For VA=12 VV_A=12 \mathrm{~V}, R1=500ΩR_1=500 \Omega and R=100ΩR=100 \Omega the galvanometer (G) shows no deflection. The value of VBV_B is In the circuit shown the cells A and B have negligible resistances. For V_A=12 ~V , R_1=500 and R=100 the galvanometer

Options

  1. A4 V4 \mathrm{~V}
  2. B2 V2 \mathrm{~V}
  3. C12 V12 \mathrm{~V}
  4. D6 V6 \mathrm{~V}

Correct answer

B. 2 V2 \mathrm{~V}

Step-by-step solution

Applying Kirchhoff's law 500I+100I=12500 I+100 I=12 So, I=12×10−26=2×10−2I=\frac{12 \times 10^{-2}}{6}=2 \times 10^{-2} Hence, VB=100(2×10−2)=2 VV_B=100\left(2 \times 10^{-2}\right)=2 \mathrm{~V}
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