An electric heater consumes electrical energy at a rate of P 5 250 W when connected to
Question:
An electric heater consumes electrical energy at a rate of P 5 250 W when connected to a battery with an emf of 120 V.
(a) What is the current in the heater?
(b) If you wish to increase the power consumption to 500 W, by what factor should the heater resistance be changed?
(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 20 A?
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The defi nition of power and Ohms law can be used to relate current voltag...View the full answer
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Related Book For 
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
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