Question

At 20°C, the carbon resistor in an electric circuit connected to a 5.6-V battery has a...

At 20°C, the carbon resistor in an electric circuit connected to a 5.6-V battery has a resistance of 2.1 ✕ 102 Ω. What is the current in the circuit when the temperature of the carbon rises to 83°C?

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Answer #1

The temperature coefficient of resistance of some materials is negative (e.g, carbon resistor) for that material the resistance decreases with increasing the temperature of the material. But the materials which have the positive temperature coefficient, the resistance increases with increasing the temperature for those materials.

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