Heater resistance
Heater resistance is the example for medium resistance.
kilo watt hour
Kilowatt Hour (kWh) is the commercial unit of electrical energy.; one kilowatt-hour is equivalent to 3.6 megajoule.
Positive temperature coefficient
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.
![The increase in resistance per ohm per degree centigrade rise in temperature is](https://mcqfinder.in/uploads/images/objective-questions/electrician-set-1-basic-electricity/electrician-set-1-basic-electricity-id-8-e.jpg)
Carbon
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.
![Which material is having negative temperature coefficient ?](https://mcqfinder.in/uploads/images/objective-questions/electrician-set-1-basic-electricity/electrician-set-1-basic-electricity-id-9-e.jpg)
Mica
Mica is the example for negative temperature coefficient substance. Mica has negative temperature coefficient of resistance. So, resistance will decrease with increase in temperature.
![Which is the example for negative temperature coefficient substance ?](https://mcqfinder.in/uploads/images/objective-questions/electrician-set-1-basic-electricity/electrician-set-1-basic-electricity-id-10-e.jpg)