Figure shows a part of a closed circuit. If the current flowing through it is what will b the potential difference be tween point A and R ?

Options

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

Answer

A

Explanation

`+ 2 V `
From figure, apply Kirchhoff.s law from A to B
`therefore V_(A) - 2 ((1)/(4) ) - 1- 2((1)/(4)) = V_(B) `
`therefore V_(A) - (1)/(2) - 1 - (1)/(2) = V_(B)`
`therefore V_(A) - V_(B) = 2 V `