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Current Electricity: Wheatstone Bridge MCQ

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Wheatstone BridgeMediumQuestion 31630

Question

Wheatstone bridge is balanced when:
  1. A
    P/Q = R/S
    Correct
  2. B
    P+Q = R+S
  3. C
    PQ = RS
  4. D
    P−Q = R−S

Correct answer

P/Q = R/S

Explanation

At balance, galvanometer reads zero and current through it is zero. KVL gives P/Q = R/S (ratio of arms).

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