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

Options

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

Answer

B

Explanation

`I_(CD) = 2-1 = 1A`
`V_(CD) = 2 xx 1 = 2 V`
`V_(A) = 0`
`V_(C ) = 1 V`
`V_(D) = 3 V`
`V_(D) - V_(B) = 2 rArr V_(B) = 3-2= 1V`