Explanation:

An ohmic conductor is a material whose electrical resistance remains constant regardless of the magnitude of the applied voltage or current. Constanton is an example of an ohmic conductor.

What is Constanton?

Constanton is an alloy of copper and nickel, typically containing 40% copper and 60% nickel. It has a low thermal coefficient of resistance and a low temperature coefficient of resistance, which means that its electrical resistance remains constant over a wide range of temperatures.

Why is Constanton an Ohmic Conductor?

Constanton is an ohmic conductor because its resistance is independent of the applied voltage or current. This is due to the fact that the electrical conductivity of the alloy is determined by the number of free electrons available to carry the current. Since the number of free electrons does not change with the applied voltage or current, the electrical resistance of Constanton remains constant.

Applications of Constanton

Constanton is used in a variety of applications where a stable resistance is required. Some of the applications of Constanton are:

- Resistance wire for heating elements
- Thermocouples
- Electrical contacts
- Precision resistors

Conclusion

Constanton is an example of an ohmic conductor because its electrical resistance remains constant regardless of the magnitude of the applied voltage or current. Its low thermal coefficient of resistance and low temperature coefficient of resistance make it a useful material in applications where a stable resistance is required.