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IF a current in a bulb is 3A . if it has 40 ohm resistance then what is the power generated by it.

IF a current in a bulb is 3A . if it has 40 ohm resistance then what is the power generated by it.
 

Grade:11

1 Answers

Ursula Arthur
11 Points
one year ago
Current is 3A and resistance is 40 ohms from power(P)=VI ...(equation 1)
But V=I R .....(equation 2)
We substitute equation 2 into equation 1.
P=I (I R)
P=3(3×40)
P=3×120
P=360 Watt

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