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Class X Sciences

[papers from previous years]

A wire is 1.0 m long 0.2 mm in diameter and has a resistance
of 10 Ω. Calculate the resistivity of its


Length of wire=1m
diameter of wire=0.2mm=0.0002m
Resistance of wire=10Ω
resistivity of wire= Resistancex area
area of wire=πr²=3.14×0.00000004=0.0000001256
0 0 0
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