Figure 12 shows a section of a house wiring system.

      

Figure 12 shows a section of a house wiring system.
physics652017345.jpg
(i) Name:
the circuit labeled P.
the terminals labeled X and Y.
(ii) I. State the purpose of R in the circuit.
II. Give a reason why R is connected to Y but not to X.
(iii) Why is the earthing necessary in such a circuit?

  

Answers


John
(i) P = Main Ring circuit X - Neutral terminal Y = Live point

(ii) I. To guard against excess current.

II. To ensure that when it (R) breaks, the appliance does not remain live.

(iii) To guard against electric shocks
johnmulu answered the question on June 5, 2017 at 12:49


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