First slide

Writing potential drop across a open line

Question

In the network shown, potential of the junction O is

Moderate

A

8.5 V
B

12 V
C

9 V
D

10 V

Solution

Applying junction rule, $\frac{20 - v}{2} + \frac{5 - v}{4} - \frac{v - 0}{2} = 0 \Rightarrow v = 9 volt$

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