An electric motor operates a pump that irri- gates a farmer’s crop by pumping 10 000 L of water a vertical distance of 8.0 m int

Question

An electric motor operates a pump that irri-
gates a farmer’s crop by pumping 10 000 L of
water a vertical distance of 8.0 m into a field
each hour. The motor has an operating resis-
tance of 22.0 2 and is connected across a
110-V source.
a. What current does it draw?
b. How efficient is the motor?

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Hải Đăng 3 months 2021-08-25T16:58:58+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-08-25T17:00:16+00:00

    Answer:

    a. 5A

    b. 39.60%

    Explanation:

    The computation is shown below:

    a. The current does it draw is

    = v ÷ R

    = 110v  ÷ 22

    = 5A

    b. Now the efficiency of the motor is

    n = mgh ÷ vlt

    = (10,000 × 9.8 × 8) ÷ (5 × 3600 × 110)

    = 784000 J ÷ 1,980,000

    = 39.60%

    hence, the above formulas are applied & the same is relevant

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )