A hair dryer designed for the 120 V outlets of the United States is taken to Europe where the outlets provide 240 V. What is the ratio v, of

Question

A hair dryer designed for the 120 V outlets of the United States is taken to Europe where the outlets provide 240 V. What is the ratio v, of a transformer that allovws the hair dryer to operate in Europe?

a. 1/4
b. 2/1
c. 1/2
d. 4/1

in progress 0
Khánh Gia 3 years 2021-08-28T17:32:14+00:00 2 Answers 8 views 0

Answers ( )

  1. ngochoa
    0
    2021-08-28T17:33:43+00:00
    Reply

    Explanation:

    Below is an attachment containing the solution.

  2. vankhanh
    0
    2021-08-28T17:34:09+00:00
    Reply

    Answer:

    c. 1/2

    Explanation:

    Transformer ratio: This can be defined as the ratio of the Secondary voltage to the primary voltage of a transformer.

    From the question, the expression of the transformer ratio is given as,

    v = Vs/Vp……………… Equation 1

    Where v = transformer ratio, Vs = secondary voltage, Vp = primary voltage.

    Note: The hair dryer is design for 120 V, when it is taken to Europe, the 240 V needs to be step down.

    Given: Vs = 120 V, Vp = 240 V

    Substitute into equation 1

    v = 120/240

    v = 1/2

    The right option is c. 1/2

Leave an answer

Browse

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