1.

(8.Whenthe resistance wire is passed through a die the cross-in resistance ofsection area decreases by 1%, the changethe wire is(a) 1% decrease(c) 2% decreaseb) 1% increase(d)--2% increase

Answer»

option a) The resistance of a material is given by :- (Resistivity * Length)/(Area of Cross section).

Hence, when length is increased by a factor ; then the resistance will also increase proportionately.



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