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NEET2016PhysicsCurrent ElectricityActual

The potential difference V A - V B between the points A and B in the given figure is

Options

  1. A- 3 V
  2. B+ 3 V
  3. C+ 6 V
  4. D+ 9 V

Correct answer

D. + 9 V

Step-by-step solution

Complicated circuits with multiple potential points and batteries can be easily solved using Kirchhoff's laws. Consider applying Kirchhoff's voltage law (KVL) to the given circuit. V A - V B = 2 × 2 + 3 + 2 × 1 = 4 + 3 + 2 = 9  V .

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