An electric heater is rated 100w and 220v. if it is operated 110v, the power consumption will be
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p=v^2/R
v=220v
R=220^2/100=484 ohm
it is the resistance of the bulb
when v=110v
p=110^2/484=25w
v=220v
R=220^2/100=484 ohm
it is the resistance of the bulb
when v=110v
p=110^2/484=25w
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