Question

how do you verify that resistance of a conductor is inversely proportional to the cross section area arof a conductor of a constant length and temperature​

Answer 1

Answer:

Collect iron spokes of different lengths ; with same cross sectional areas. Make a circuit leaving gas between P and Q with a battery, ammeter and plug key. ... From this, we conclude that the resistance of a conductor is directly proportional to its length (l) for constant cross-sectional area. Therefore, R∝L.