If the resistance of a conductor is doubled,the current is halved.

Why is parallel arrangement used in domestic wiring?

An electric bulb is connected to a $220 \ V$ generator. The current is $0.50 \ A$. What is the power of the bulb?

Two conductors,one having resistance $R$ and another $2R$ are connected in turn across a $dc$ source. If the rate of heat produced in the two conductors is $Q_{1}$ and $Q_{2}$ respectively,what is the value of $Q_{1} / Q_{2}$?

Is electrostatic potential a scalar quantity or a vector quantity?

$(a)$ Name the effect of electric current which is utilised in the working of an electrical fuse.
$(b)$ How is a fuse connected in a domestic circuit?