The filament of an electric bulb is made of tungsten as it has a high melting point.

Give reasons for the  following:

Nichrome wire is used as a heating element instead of copper wire.

Differentiate between the following.

Heating effect and magnetic effect of current

Heating effect of current.

Observe the given diagram and answer the question that follows.

Which effect of electricity is used?

An electric oven of $3 \mathrm{kW}$ is connected to the mains of $220 \mathrm{V}$. Calculate:

The amount of energy consumed if the oven is switched on for an hour.

Observe the given diagram and answer the question that follows.

How is the temperature adjusted when we rotate the knob while using an electric iron on different fabrics? 

Name the materials used for making:

(a) heating element of an electric heater