Question

9.The length of different metallic wires but of same area of cross section and made of the same
material are given below:
Wire Length
A 1m
B 1.5m
C 2.0m
(i) Out of these two wires which wire has higher resistance.
(ii) Which wire has higher electrical Resistivity? Justify your answer.

Answer 1

Answer:

Explanation:

Resistance (R) =

rho × length (l) ÷ Area (A)

So the wire with longest length (l) will have the higher resistance (R).

And We know that,

(Resistivity) rho =

Resistance (R) × Area (A) ÷ Area (A)

So the wire with Higher Resistance (R) will have the highest Resistivity (rho).

Hope this helps.