How Is Electrical Energy Converted to Heat in a Lamp?

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A 60 W lamp with a potential difference of 120 V converts electrical energy to heat at a rate of 60 J/sec. The current through the lamp can be calculated as 0.5 A, derived from the power formula. The power rating of the lamp directly indicates the rate of energy transformation. No additional calculations are necessary to determine this rate. The discussion confirms that the power rating provides the answer.
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Homework Statement


a 60 W lamp has a potential difference of 120 V across its terminals. at what rate is electrical energy transformed into heat at the lamp?


Homework Equations





The Attempt at a Solution



60 W: 60/120 = 0.5A (0.5 A)(120V) = 60 J/sec
 
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That's correct. The definition of power, which is 60 W, is the rate electrical energy is transformed. You don't need to do any calculations. The answer is given.
 

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