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Dependence of Resistance on Temperature

Question

For a chosen non-zero value of voltage, there can be more than one value of current in:
Copper wire
Thermistor
nichrome wire
Manganine wire

A

Thermistor

B

Manganine wire

C

Copper wire

D

nichrome wire

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Solution

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Thermistor are made up of substance with high $α$ , which is very much sensitive to temperature thereby a slight change in temperature varies its resistance with huge amount.
hence making more than one value of current possible for chosen non-zero value of voltage.

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