Question

An ohmic resistor in a circuit is designed to operate at 120 V.
(a) If you connect the resistor to a 60-V power source, will the resistor dissipate heat at (1) 2, (2) 4, (3) ½, or (4) ¼ times the designed power? Why?
(b) If the designed power is 90 W at 120 V, but the resistor is connected to a 30-V power supply, what is the power delivered to the resistor?


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  • CreatedAugust 29, 2015
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