an electric bulb is rated at 220v, 100w. find the resistance
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Answered by
0
Answer:
The resistance will increase due to the heat of the filament. So lets do some maths, 100÷220=0.4545 amps now to find the resistance using ohms law 220÷0.4545=484 ohms. This is when lamp is drawing current. An electric bulb is rated as 220V 100W.
Answered by
1
Answer:
power=current*voltage
100 W=current*220 V
current=100W/220V
current=5/11 A (amphere)
resistance=voltage/current
R=220/(5/11)
R=11*220/5
R=2420/5
resistance=484 R
Explanation:
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