Potential and potential difference are vector quantities.

What is the current flowing through a $60 \ W$ bulb when it is connected to a $240 \ V$ line?

Which law is used to calculate the magnitude of the electric force between two electric charges?

The resistivity of semiconductor materials is $..........$.

In an electrical circuit,two resistors of $2\,\Omega$ and $4\,\Omega$ respectively are connected in series to a $6\,V$ battery. The heat dissipated by the $4\,\Omega$ resistor in $5\,s$ will be ........ $J$.

$(a)$ Calculate the resistance of the wire using the graph.
$(b)$ How many $176 \,\Omega$ resistors in parallel are required to carry $5\, A$ on a $220\, V$ line?
$(c)$ Define electric power. Derive the relation between power,potential difference,and resistance.