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What is a wheat stone bridge in physics?
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Definition. A wheat stone bridge is an
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electrical circuit used to measure an
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unknown resistance accurately by
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balancing it against known resistances.
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Explanation: It consists of four
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resistors connected in a quadrilateral
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with a galvanometer connected between
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two opposite points and a battery across
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the other two points. When the ratio of
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resistances in one arm equals the ratio
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in the other arm, no current flows
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through the galvvinometer. This is the
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balanced condition. At this point, the
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unknown resistance can be calculated
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using the known values.
