A Wheatstone bridge is said to be completely balanced when:
A. The battery supplies zero current.
B. Current through the galvanometer is maximum.
C. All four resistors have exactly identical values.
D. Potential difference across the galvanometer is zero.
Answer: Option D
Solution (By JKExamLibrary)
A Wheatstone bridge circuit consists of four arms with resistances P, Q, R, S and a galvanometer in the middle. It is balanced when no current flows through the galvanometer arm. This happens exclusively when the potentials at the two ends of the galvanometer are equal, meaning the potential difference across it is exactly zero (P/Q = R/S).
This question belongs to:
Science
Physics
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