Question

67. With decrease in density of the material, the
resistance of the conductor
(a) increases
(b) decreases
(c) remains the same
(d) first increases then decreases​

Answer 1

Answer:

If length will same but area decreased resistance would be same but passes of current reduces due to other reason that atomic structure reduced and the no of atoms and then electrons reduced

Answer 2

Answer:

Electron density in conduction band of conductor is enough to flow charge, But when temperature increase then density of electron increase so time between two successive collision decrease, Hence Resistance increase.