Science, asked by Anonymous, 11 months ago

How many devices of power 22 W each can be put across 220 V, so that current in the circuit does not exceed 3A?

With good explanation!
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| CBSE | Class X​

Answers

Answered by Anonymous
2

Explanation:

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Firstly we calculate the resistance of the bulb,

According to Ohm’s Law

R=V/I Where,R=Resistance , V=Voltage ,I=Current..

100w at 220v, I=P/V.

=100/220=0.454Amp.

R=V/I; 220/0.454=484.56 ohms.

When it is connected to 240 Volts

I=V/R; 240/484.56=0.495 ~ 0.50 Amps.

Power consumed(P)=V×I; 240×0.50=120 W.

The bulb will consume 120 W at 240 Volts. 20W

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Answered by koushikreddy2004
3

Answer:

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