Question

Resistance of a wire always increases if
(a) temperature is reduced.
(b) temperature is increased.
(c) number of free electrons available become less. (d) number of free electrons available become more.

Answer 1

Answer:

C

Explanation:

Resistance of wire always increases if number of free electrons available become less ;)

Answer 2

Resistance of a wire always increases if (c) number of free electons available become less.

• A wire's resistance is proportional to its length and inversely proportional to the area of its cross-section.
• Resistance is also affected by the conductor's substance.
• Free electrons are charged when the number of electrons are less the resistance is less, when the number of electrons is more the resistance is more.