A 500-W electric heater unit is designed to operate with an applied potential difference of 120 V.
Question:
(a) If the local power company imposes a voltage reduction to lighten its load, dropping the voltage to 110 V, by what percentage does the heat output of the heater drop? (Assume the resistance does not change.)
(b) If you took the variation of resistance with temperature into account, would the actual drop in heat output be larger or smaller than calculated in part (a)?
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Step by Step Answer:
Strategy Use Eq 1821b a Form a proportion 1 084 016 so the heat ou...View the full answer
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Related Book For 
Physics
ISBN: 978-0077339685
2nd edition
Authors: Alan Giambattista, Betty Richardson, Robert Richardson
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