Question

Find the value of r if I-1A and potential difference across PQ is 1V

• A. 5Ω
• B. 10Ω
• C. 20Ω
• D. 25Ω

Answer 1

The correct option is D

25Ω

Between P and Q, $R=\frac{3\times 2}{3+2}=\frac{6}{5}$
Current between P & Q $=\frac{5}{6}amp.$
Current in 1$\Omega$ resistor $=1+\frac{5}{6}=\frac{11}{6}amp.$