The potential difference between the points V and B in the following circuit will be -

Options

A. zero
B. 2 V
C. 3.5 V
D. 4.5 V

Answer

D

Explanation

`2I+2I_(1)-6=0`
`I+I_(1)=3 " " ...(1)`
`(I-I_(1))1+6-2I_(1)=0`
`I-3I_(1)=-6 " " ...(2)`
from (1) & (2)
`underset((underset(-)()Iunderset(+)(-)3I_(1)=underset(+)(-)6)/(4I_(1)=9))(I+I_(1)=3)`
`:. I_(1)=9//4`
`V_(A)-V_(B)=IR`
`=9//4xx2`
`=9//2=4.5`