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A current of 2 A flows in an electric ci...

A current of 2 A flows in an electric circuit as shown in figure. The potential difference `(V_(R )- V_(S))`, in volts `(V_(E ) " and " V_(S)` are potenitals at R and S respectively) is

A

`-4`

B

`+2`

C

`+4`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
C
Current through each arm
PQR and PSQ = 1A
`V_(p)-V_(R)=3V`
`V_(P)-V_(S)=7V`
From Eqs. (i) and (ii), we get
`V_(R)-V_(S)= +4V`
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