Earthing of electrical appliances is very important.

How does the magnetic field produced by a current-carrying straight wire vary with the distance from the wire?

Define magnetic field. Describe an activity to draw magnetic field lines around a bar magnet from one pole to another pole.

$(i)$ The given figure shows a domestic electric circuit. Study this circuit carefully. List any two errors in the circuit and justify your answer.
$(ii)$ Give one difference between the wires used in the element of an electric heater and in a fuse:
$(iii)$ List two advantages of parallel connection over series connection.

The figure below shows a current-carrying loop passing through a sheet of cardboard. Draw three magnetic field lines on the cardboard.
Give two factors on which the magnitude of the magnetic field at the centre of the loop depends.

In order to find the force experienced by a current-carrying conductor,we can use Maxwell's corkscrew rule.