The magnetic field produced by a current flowing through a straight conductor is inversely proportional to the $........$.

How is the relative strength of a magnetic field shown around a magnet?

Describe in short an activity to:
$(i)$ demonstrate the pattern of magnetic field lines around a straight current-carrying conductor, and
$(ii)$ find the direction of the magnetic field produced for a given direction of current in the conductor. Name and state the rule to find the direction of the magnetic field associated with a current-carrying conductor. Apply this rule to determine the direction of the magnetic field inside and outside a current-carrying circular loop lying horizontally on a table. Assume that the current through the loop is anticlockwise.

Two long parallel wires are hanging freely. If they are connected to a battery $(i)$ in series and $(ii)$ in parallel,what would be the effect on their positions?

Explain what is short-circuiting and overloading in an electric supply.

You have just paid the electricity bill for your house.
$(i)$ What was it that your family consumed,for which you had to pay?
$(ii)$ In what unit was it measured?