Question

4. Name two electric devices for each, where
(a) Heating effect of current is used.
(b) Magnetic effect of current is used.

Answer 1

Dear student

Answer 4
(a) Electric Geysers, electric iron, electric bulb - all are based on heating effects of current.

The working principle of a fuse wire is based on the heating effect of current. When high current flow through the fuse (current higher than the rated value) then the heat developed in the wire melts it and breaks the circuit.

In electric iron, electric heat the heating effect of current is used.

In an incandescent electric bulb (bulb with filament) the heating effect of current is used to produce light.

(b) The applications in which magnetic effect of electricity works are

(1) Electric bell.

(2) Electric fan etc
In above cases, magnetic field is created by magnetic dipoles and moving electric charges, and it exerts a force on other nearby moving charges and magnetic dipoles.

Regards