Question

Consider the circuit shown below where all resistors are of 1 k $\Omega$

If a current of magnitude 1 mA flows through the resistor marked X, what is the potential difference measured between point P and Q?

• A. 21V
• B. 68V
• C. 55V
• D. 34V

Answer 1

The correct option is D

34V

Using KCL

At point A

Current is 3mA

At point C

Current is 8 mA

At point E

Current is 21 mA

At point G

Current through GH is

34ma

$\therefore$ $V_{PQ}$ = $V_{GH}$ = i $R_{GH}$

= 34 V