Question

List three characteristic features of the electric current used in our homes.

Answer 1

Electric Current

1. Charges in uniform motion are called electric currents.
2. Moving charges constitute an electric current.
3. A current is said to be a steady current if it is independent of time, though it may vary spatially.
4. Quantitatively electric current $I$ is defined as the rate of flow of charge through a given surface in a conducting medium.
5. Thus if $dq$ amount of charge is transported in time $dt$ through a given cross-section then electric current, $I=\frac{dq}{dt}$.
6. The unit of current in the SI system is the ampere $\left(A\right)$ which is equal to $1C/s$.

Electric Current at home

Three characteristic features of the electric current used in our homes are:

1. Appliances to be connected in parallel.
2. Each of the appliances has a separate switch to ON/Off the flow of current through it.
3. The potential difference between a live wire and the neutral wire is about $220V$.