The wattage of a bulb is 24W when it is connected to a 12 v battery. Calculate the effective wattage if it operates on 6v battery. Calculate the wattage if it operates on a 6 v battery. Please answer it as soon as possible
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The wattage of a bulb is 24W when it is connected to a 12 v battery. Calculate the effective wattage if it operates on 6v battery
Power = Voltage²/ Resistance
P = V²/R
=> R = V²/P
P = 24 W
V = 12 V
R = (12)²/24
=> R = 144/24
=> R = 6 Ω
Power when connected to 6 V
P = 6²/6
=> P = 36/6
=> P = 6 W
So wattage = 6 W if operated on 6 V
Power reduced to one fourth if voltage is halved.
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Answer is attached friends.
6 watt is the answer
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