Ask Question
18 January, 22:37

A motor is rated to deliver (output) 2.5 hp at 120 VDC. If the motor runs on 120 V and is 75% efficient, how many watts does it draw from the power line (input) ? (input power is always greater than output power, and remember to use a horse power conversion: 1hp = 746 (watts) (a) 3.33 W (b) 1399 W (c) 1679 w (d) 2072 W (e) 2487 W

+2
Answers (1)
  1. 19 January, 01:44
    0
    (e) 2487 W

    Explanation:

    Given data

    voltage = 120 V

    power = 2.5 hp

    efficiency = 75%

    To find out

    watts draw from the power line

    solution

    we calculate efficiency by given formula

    efficiency = (output / input) * 100 ... 1

    we know our output is 2.5 hp = 2.5 * 746 = 1865 W

    and efficiency is 75% = 0.75

    put these value in equation 1 and find out input power

    power = (1865 / 0.75)

    power = 2486.66 W

    so our answer is (e) 2487 W
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A motor is rated to deliver (output) 2.5 hp at 120 VDC. If the motor runs on 120 V and is 75% efficient, how many watts does it draw from ...” in 📙 Engineering if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers