An engine uses 30 A of current. The resistance offered is 15 ohms. Calculate the power consumed by the engine in horse power.
Correct answer: A. 18 hp
- A. 18 hp
- B. 19 hp
- C. 17 hp
- D. 13500 hp
Explanation
The engine uses a current of 30 A and has a resistance of 15 ohms. To find the power consumed, apply the formula Power = current² × resistance. Substituting the given values: Power = 30 × 30 × 15 = 13,500 Watts.Next, convert watts to horse power using the conversion factor 1 hp = 746 Watts. Therefore, 13,500 Watts is equivalent to 13,500 / 746 ≈ 18.096 hp, which rounds to 18 hp. Thus, the engine consumes approximately 18 hp.Options B, C, and D are incorrect because they either do not correctly calculate the conversion from watts to horse power or misinterpret the given data.
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