Question

Why should we connect electric appliances in parallel in a household circuit? What happens if they are connected in series?

Answer 1

We should connect electrical appliances in parallel so that each appliance would get full voltage. If one appliance is faulty, other appliance will continue working. Each appliance will get the desired current according to their resistance.

If they will be connected in a series resistance will be more so the current flow will decrease. The same amount of current will flow through every appliance which is not required. All appliances should have to use simultaneously even though we do not need them. We cannot use independent switches for individual appliances.