What is the minimum resistance which can be made using five resistors each of $1/5\,\Omega$?

What is potential difference? Is it a scalar quantity or a vector quantity? Give its $SI$ units.

The unit $Joule/second$ $(J/s)$ is the unit of which of the following?

In a household,$5$ tube lights of $40 \text{ W}$ each are used for $5 \text{ hours}$ and an electric press of $500 \text{ W}$ for $4 \text{ hours}$ everyday. Calculate the total energy consumed by the tube lights and press in a month of $30 \text{ days}$.

The electrical appliance having higher power draws a larger current.

If a $12 \ V$ battery is connected to the arrangement of resistances given below,calculate
$(i)$ the total effective resistance of the arrangement and
$(ii)$ the total current flowing in the circuit.