Current Electricity and Electrical InstrumentHard

Question

In the circuit shown in the figure, if the potential at point A is taken to be zero, the potential at point B is
        

Options

A.+1 V
B.- 1 V
C.+ 2 V
D.- 2 V

Solution

          
Applying Kirchhoff voltage law in the circuit is as shown in the figure below
         
∴     VA + 1 + 2(1) - 2 = VB
      0 + 1 = VB         (∵ VA = 0(Given))
      VB = + 1V

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