Resistance = Voltage/Current
Wattage = Voltage * Current
That means the current drawn by the lamp is equal to 100 watts divided by 210 volts.
Resistance = 210/100/210
Wattage = Voltage * Current
That means the current drawn by the lamp is equal to 100 watts divided by 210 volts.
=411 is the answer
If you need more help I will be glad to help!:D
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