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An electric heater consumes electrical energy at a rate of P = 350 W, when connected to a battery with an emf of 120 V.
(a) What is the current in the heater?
A
(b) If you wish to increase the power consumption to 700 W, by what factor should the heater resistance be changed?
Rfinal
Rinitial =
(c) What is the maximum power that could be drawn if the circuit contained a circuit breaker that limited the current to no more than 5 A?
W
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