Question

In a typical Wheatstone's network the resistance in cyclic order are P = 10 ohm, Q = 5 ohm, S = 4 ohm and R = 4 ohm. For the bridge to balance

• A. 5 ohm should be connected in series with Q
• B. 5 ohm should be connected in parallel with Q
• C. 10 ohm should be connected in series with P
• D. 10 ohm should be connected in parallel with P.

Answer 1

Answer: (A), (D)

and 4 Here $\frac{R}{S}=\frac{4}{4}$ = 1 and $\frac{P}{Q}=\frac{10}{5}$
If 5$\Omega$ resistor is added in series with Q then $\frac{P}{Q}=\frac{10}{10}=1$