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Which error is removed when the known and unknown resistances are interchanged in a Meter Bridge?

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in Physics – Class 12 by (135k points)
Which error is removed when the known and unknown resistances are interchanged in a Meter Bridge?

(a) Percentage error

(b) Measurement error

(c) End error

(d) Index error

The question was asked in final exam.

My question comes from Current Electricity topic in section Current Electricity of Physics – Class 12

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Best answer
The correct answer is (c) End error

The best I can explain: End error is removed when the known and unknown resistances are interchanged in a Meter Bridge. This additional length has a resistance known as end resistance. So, when an end error arises, it can be removed by interchanging the known and unknown resistances and taking the mean of the resistances determined.

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