Question

calculate the potential difference between the point P and Q​

Answer 1

Answer:

Let current be I

Use kvl

$- 9i - 2i + 12 - 8 - i = 0 \\ 12i = 4 \\ i = \frac{1}{3}$

Again from P to Q

$v = i + 8 - 12 + 2i = 3i - 4 = - 1$

Answer 2

Answer:

Let current be I

Use kvl

\begin{lgathered}- 9i - 2i + 12 - 8 - i = 0 \\ 12i = 4 \\ i = \frac{1}{3}\end{lgathered}

−9i−2i+12−8−i=0

12i=4

i=

3

1

Again from P to Q

v = i + 8 - 12 + 2i = 3i - 4 = - 1v=i+8−12+2i=3i−4=−1