If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________?
Correct answer: B. the bridge cannot be balanced
- A. the bridge can always be balanced
- B. the bridge cannot be balanced
- C. the bridge can be balanced if the resistances have some specific values
Explanation
A bridge balances only when the ratios of opposite-arm impedances have equal magnitude and phase. An inductive arm introduces a phase angle, while the other three purely resistive arms have zero phase angle, so balance is impossible.
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