What is cost of running a lamp for a day
at 50shs per kwh if it is marked 100w 250v
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Answer:
Explanation:
Power = P = 100w
Voltage = 220v
Time = 2hrs
Resistance = R =?
Formula to be used :
P=V*1
But 1 = V/R
Their for P = V^2/R
R = V^2/P
= 220x220/100
= 484 ohms
To Calculate Energy Consumed :
Formula : E = Pxt
100x5 = 500 wh
500/1000 kWh
= 0.5 kWh
Their for : Resistance while glowing is 484 ohms and energy consumed in kWh per day ps 0.5
Hope it help you!
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