Which of the following will increase the heat produced by a heating element?
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A.
Using a material with high conductivity
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B.
Decreasing the applied voltage
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C.
Using a wire of lower resistance
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D.
Increasing the current flowing through the wire
Correct Answer:
D. Increasing the current flowing through the wire
Explanation:
The correct answer is Increasing the current flowing through the wire.
The heat produced by a heating element is determined by the formula for Joule heating, where power is equal to the square of the current multiplied by the resistance. Because heat generation is directly proportional to the square of the current, any increase in the flow of electricity through the element will significantly raise the amount of thermal energy produced. Conversely, decreasing the applied voltage or using a wire with lower resistance would reduce the power output, while high conductivity materials typically have lower resistance, which also decreases heat production at a fixed current. Increasing the current is the most effective way to amplify the heat output of the system.
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