# The thermistors are usually made of Option 1) metals with low temperature coefficient of resistivity Option 2) metals with high temperature coefficient of resistivity Option 3) metal oxides with high temperature coefficient of resistivity Option 4) semiconducting materials having low temperature coefficient of resistivity

As we learnt in

Thermistors are made of metal oxides with high-temperature co­efficient of resistivity.

As we discussed in

Temperature dependent Resistivity -

$\rho=\rho_{o}(1+ \alpha (T-T_{o}))$

-

thermistors are made of metal oxides with high-temperature co-efficient of resistivity.

Option 1)

metals with low temperature coefficient of resistivity

This option is incorrect.

Option 2)

metals with high temperature coefficient of resistivity

This option is incorrect.

Option 3)

metal oxides with high temperature coefficient of resistivity

This option is correct.

Option 4)

semiconducting materials having low temperature coefficient of resistivity

This option is incorrect.

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