Question

which of the following has PTC(+ve temperature coefficient of resistance)
metals
non-metals like carbon
electrolyte
semiconductors

Answer 1

Answer:

Metals

Explanation:

Metals have Positive temperature of coefficient. It means that the resistance of metals increase when exposed to higher temperature. This is because of the fact that when a metal is heated, the random motion of charged particles also increase which hinder the flow of electrons. Hindrance of electron flow means increase in resistance. Hence metals have PTC of resistance