Physics
State the function of each of the following in a house circuiting —
(a) kWh meter, (b) main fuse, and (c) main switch
Answer
(a) kWh meter — After the company fuse, the cable is connected to a kWh meter. The kWh meter is usually mounted on the front (or outside) wall of the house. The function of kWh meter is to measure the amount of electric energy consumed in kWh so that the electricity bill could be generated accordingly.
(b) Main fuse — It is connected only in the live wire. The main fuse melts in case of heavy electric current and the circuit is broken and thus the appliance is protected and safety is maintained.
(c) Main switch — It is connected in both the live and neutral wires. It is used to break the connections of the live as well as the neutral wires simultaneously from the main supply. This protects the electrical appliances from accidental damage due to electrical faults.
Related Questions
What is the pole fuse? Write down it's current rating.
State one advantage of using the main switch in house wiring.
Two sets A and B each of four bulbs are glowing in two separate rooms. When one of the bulbs in set A is fused, the other three bulbs also cease to glow. But in set B, when one bulb fuses, the other bulbs continue to glow.
(i) Explain the difference in the two sets,
(ii) Which set of arrangement is preferred in housing circuit and why?
(a) Name the three connecting wires used in a household circuit.
(b) Which of the two wires mentioned in part (a) are at the same potential?
(c) In which of the wire stated in part (a) the switch is connected?