the charges
34. A resistance wire of length 0.85m and radius0.2mm is
connected in the left gap of the metre bridge. A standard
resistance of 50 is connected in the right gap. The balancing
length is 0.485m. Calculate the resistivity of the material of
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Answer:
Explanation:
Using relation,
Where R1 is the resistance just above the wire of l units, and R2 is above the remaining length of 100-l units (since the wire length is 100cm) in a meter bridge.
Let the resistance of unknown wire be R
Now using the values from here :
Now since,
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