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Sep 07

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CBSE CLASS X CCE: QUESTIONS FOR SA 1

QUESTION: In a household electric circuit different appliances are connected in parallel to one another. Give two reasons.
An electrician puts a fuse of rating 5A in that part of domestic electrical circuit in which an electrical heater of rating 1.5kW, 220V is operating. What is likely to happen in this case and why? What change, if any, needs to be made?
ANSWER: (i) The appliances can be operated independently.
(ii) They get the same applied voltage
The fuse will not blow off even if the current in these devices were to exceed their safe current value.
This could damage these devices and even cause fire.
Any fuse of lower amperage needs to put in the circuit

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