How does the resistance of a metallic wire depend on the following: (

1.	How does the resistance of a metallic wire depend on the following: (i) the length of wire; (ii) the thickness of wire, (iii) the temperature of wire?
Answer» (i) The resistance of a wire increases with increases in the length of wire (R ∝ l). (ii) The resistance of a wire decreases with increase in its thickness (R ∝ l/a where a = πr², the area of crosssection of the wire). (iii) The resistance of a metallic wire increases with increase in its temperature.

How does the resistance of a metallic wire depend on the following: (i) the length of wire; (ii) the thickness of wire, (iii) the temperature of wire?

Answer»

(i) The resistance of a wire increases with increases in the length of wire (R ∝ l).

(ii) The resistance of a wire decreases with increase in its thickness (R ∝ l/a where a = πr², the area of crosssection of the wire).

(iii) The resistance of a metallic wire increases with increase in its temperature.

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How does the resistance of a metallic wire depend on the following: (i) the length of wire; (ii) the thickness of wire, (iii) the temperature of wire?

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