In this section of a circuit, a current of 2.6 A flows across R1. What is the potential difference V between point x and point y (across R2)? Let R1 = 4.0 ohm, R2 = 8.0 ohm, and R3 = 1.0 ohm.

Answer:
V=21V
Explanation:
In series combination current is same
I=2.6A
R2=8ohm
V2=2.6×8
V2=20.8
V2=21V