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  • (a) State with reasons the mode of connecting all electrical appliances in common domestic electric circuits. (b) Which two separate circuits are often used in domestic electric circuits and why ? (c) When does an electric short cir

(a) State with reasons the mode of connecting all electrical appliances in common domestic electric circuits.

(b) Which two separate circuits are often used in domestic electric circuits and why ?

(c) When does an electric short circuit occur ? How can it be prevented ?

 

 
 
 
 
 

Answers (1)

a. All electrical appliances in common domestic electric circuits are connected in parallel because:
1) All appliances will be operated by different switches.
2) If one appliance stop working it will not affect another.
3) All appliances will get the same voltage hence it will be easy to run all the appliances simultaneously.

b. The two different circuits in a house lighting circuit with 5 A fuse and a power circuit with 15 A fuse. The lighting circuit is for running low power rating devices such as electric bulbs, fans, radio, etc. The power circuit is for running high power rating devices like Electric iron.

c. Electric short circuit – if the insulation of the live wire and the neutral wire gets stone then the two wires touch each other. Live wire and neutral wire come in contact with each other. the current flowing through the wires become very large and hits the wire to a high temperature and fire may start.

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