A) 401.5 ohm
B) 404.5 ohm
C) 403.5 ohm
D) 402.5 ohm
Correct Answer: D
Solution :
For a balanced bridge,\[\frac{P}{Q}=\frac{400}{X}\] ...(i) After interchanging P and Q,\[\frac{P}{P}=\frac{405}{X}\] ...(ii) Multiplying both the equations, \[X=\sqrt{{{R}_{1}}{{R}_{2}}}=\sqrt{400\times 405}=402.5\Omega \]You need to login to perform this action.
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