Here are 2 pictures of a radiant heater showing it before and after it is turned on. It is made of 2 heating elements that are wired in parallel. Each element is rated at 1kW. It is connected to mains voltage. If you click on the top picture to enlarge it, you'll see that each element is made of reasonably thick wire wound around a cylinder. Ignore the central cylinder - it's the wire that spirals around it that carries the current and heats up.
I want you to
- Calculate the resistance of one of the heating elements.
- Estimate the length and cross-sectional area of one spiral of heating wire.
- Calculate the resistivity of the wire.
- See if you can find a metal with that resistivity.
