JEE Main 2004 Physics question

The thermistors are usually made of

(1)metals with low temperature coefficient of resistivity
(2)metals with high temperature coefficient of resistivity
(3)metal oxides with high temperature coefficient of resistivityCorrect
(4)semiconducting materials having low temperature coefficient of resistivity.

Answer: (3)

Solution

A thermistor is a heat-sensitive resistor whose resistance changes strongly with temperature; it is made from sintered oxides of metals such as Mn, Ni, Co, Fe, which have a large

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Question ID VK-038313