Question

(a)
State four factors on which the resistance of a conductor depends.
3
(b)
A piece of wire of resistance 2022 is drawn out so that its length is increased
to twice its original length. Calculate the resistance of the wire in the new
situation.​

Answer 1

Answer:

The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity

3(b)A piece of wire of resistance 20Ω is drawn so that its length is increased to twice is original length. Calculate resistance of the wire in the new situation. ... When the length becomes 2l and cross-sectional area is A/2. Rnew=ρ(2l)A/2=4(ρl/A)=4(20Ω)=80Ω.

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