Electricity is distributed from electrical substations to neighborhoods at 13000 V. This is a 60 Hz oscillating (AC) voltage. Neighborhood t

Question

Electricity is distributed from electrical substations to neighborhoods at 13000 V. This is a 60 Hz oscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120 V that is delivered to your house.
A. How many turns does the primary coil on the transformer have if the secondary coil has 120 turns?

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Neala 3 years 2021-09-03T07:43:50+00:00 1 Answers 40 views 0

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    2021-09-03T07:45:13+00:00
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    Answer:

    the number of turns in the primary coil is 13000

    Explanation:

    Given the data in the question;

    V₁ = 13000 V

    V₂ = 120 V

    N₁ = ?

    N₂ = 120 turns

    the relation between the voltages and the number of turns in the primary and secondary coils can be expressed as;

    V₁/V₂ = N₁/N₂

    V₁N₂ = V₂N₁

    N₁ = V₁N₂ / V₂

    so we substitute

    N₁ = (13000 V × 120 turns) / 120 V

    N₁ = 1560000 V-turns / 120 V

    N₁ = 13000 turns

    Therefore, the number of turns in the primary coil is 13000

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