A step-down transformer is used for re-charging the batteries of portable devices such as tape players. The ratio of turns inside the transf

Question

A step-down transformer is used for re-charging the batteries of portable devices such as tape players. The ratio of turns inside the transformer is 10:1, and it is used with 120 V (rms) household service. A particular ideal transformer draws 0.350 A from the house outlet.
A) What are the voltage.
B) What are the current supplied to a tape player from the transformer?
C) How much power is delivered?

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Linh Đan 3 years 2021-07-15T13:22:16+00:00 1 Answers 6 views 0

Answers ( )

  1. Delwyn
    0
    2021-07-15T13:23:21+00:00
    Reply

    Answer with Explanation:

    We are given that

    \frac{N_1}{N_2}=10

    V_1=120 V

    I_1=0.350 A

    a.\frac{V_1}{V_2}=\frac{N_1}{N_2}

    Using the formula

    \frac{120}{V_2}=\frac{10}{1}

    V_2=\frac{120}{10}=12 V

    b.\frac{I_2}{I_1}=\frac{N_1}{N_2}

    \frac{I_2}{0.350}=10

    I_2=0.350\times 10=3.5 A

    c.Power delivered,P=I_2V_2=I_1V_1

    P=120\times 0.350=42 W

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