If an electric iron of 120 ohms operates at 220 V, then the rate of heat developed is equal to:
Correct answer: D. 403.33 W
- A. 0.54 W
- B. 1.83 W
- C. 65.45 W
- D. 403.33 W
Explanation
To determine the rate of heat developed by an electric iron, we can use the formula:Power (P) = (Voltage)^2 / ResistanceGiven that the electric iron operates at 220 V and has a resistance of 120 ohms, we can substitute these values into the formula:Power (P) = (220)^2 / 120 = 48400 / 120 = 403.33 WTherefore, the correct option is d. 403.33 W.
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