State difference between the wire used in the element of an electric heater and in a fuse wire.

How does the resistance of an ohmic conductor depend on the applied voltage?

An electric fan/motor becomes warm when continuously used for a long time. Why?

A 9 Ω resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.

An electrical appliance draws a current of 0.5 A when applied potential difference across it is 220V. Calculate the amount of charge flowing through it in 30 minutes.