Question

if known and unknown resistances are equal in a metrebridge the bridge will be equal at​

Answer 1

Answer:

In a meter bridge experiment, the known and unknown resistances are mutually interchanged to remove end error. In meter bridge some smaller part of the experimental wire may be found under metallic strip at the ends. This additional length has some resistance known as end resistance. Hence, to measure the accurate length, first the balancing length is obtained by keeping the known and unknown resistances left and right gap and then again the balancing length is obtained by interchanging the known and unknown resistances to nullify the effect of unaccounted resistance offered by terminals.

Explanation:

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Answer 2

Answer:

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