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JEE Main20205 Sep 2020Evening ShiftPhysicsCurrent ElectricityActual

In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is:

Options

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

Correct answer

D. + 1 V

Step-by-step solution

Using kirchhoff's law in the circuit A C D B , we get Voltage at B = voltage at A + voltage of battery of 1   V + potential difference across 2   Ω resistance - voltage of battery of 2   V ⇒ V A + 1 + 2 ( 1 ) - 2 = V B Now potential at point B with respect to point A is given by, ⇒ V B - V A = 1   V

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