Question

Decorative lights are made using many bulbs of low power and are all connected in series and parallel combinations. If we want to connect two bulbs to the same battery than an obvious way to connect them is in series. At home, all your appliances are connected in parallel with each other. This means they all get the full mains voltage and you can turn on your tv without turning your microwave. Each appliance has its own connection between live and neutral. Even though all the appliances in our home are connected across the same voltage, they all draw different currents.

(i) What problem you face when you connect two bulbs in a series ?

(ii) List two advantages of connecting the bulbs in parallel.

(iii) As a student what initiative you take to suggest the statement "Power Consumption".

Answer 1

(i) When bulbs are connected in series, even if one bulb fuses or is removed, the others do not glow.

(ii) Advantages of connecting bulbs into parallel :

(a) They get full battery voltage, so they all glow brightly.

(b) They remain only at their conducting loop without affecting others.

(iii) Suggestions :

(a) Less electrical appliances should be connected in parallel.

(b) To use compact fluorescent appliances.