Question

8. Iwo lamps,one rated 60w at 220V and the other 40w at 220v, are connected in parallel to the electric
supply at 220v
a)Draw a circuit diagram to show the connections.
b)calculate the current drawn from the electric supply.
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Answer 1

EXPLANATION.

• GIVEN

two lamps one rated = 60W at 220V

other 40W at 220V are connect in parallel to

the electric supply at 220V

QUESTION = A

Please see image attachment of question 1

QUESTION = B

as we know that

I = p/v

current drawn at 40 volt =

ia = p/v = 40/220A

0.18A

current drawn at 60 volt =

ib = p/v = 60/200A

0.27A

Total current drawn from circuit

I = ia + ib

I = 0.18A + 0.27A

I = 0.45A