A positive temperature coefficient (PTC) refers to materials that experience an increase in electrical resistance when their temperature is raised. Materials which have useful engineering applications usually show a relatively rapid increase with temperature, i.e. a higher coefficient.
8) The increase in resistance per ohm per degree centigrade rise in temperature is
Answer is:
Positive temperature coefficient
Explanation:
Related Basic Electricity MCQ - Electrician (Set-1) with Answers
Answer is:
Carbon
Explanation:
A negative temperature coefficient (NTC) refers to materials that experience a decrease in electrical resistance when their temperature is raised. The lower the coefficient, the greater a decrease in electrical resistance for a given temperature increase. Carbon is having negative temperature coefficient.
Answer is:
Mica
Explanation:
Mica is the example for negative temperature coefficient substance. Mica has negative temperature coefficient of resistance. So, resistance will decrease with increase in temperature.
Answer is:
temperature coefficient of resistance
Answer is: