Share

## 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?

in progress
0

Physics
3 years
2021-09-03T07:43:50+00:00
2021-09-03T07:43:50+00:00 1 Answers
40 views
0
## Answers ( )

Answer:the number of turns in the primary coil is

13000Explanation: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 turnsTherefore, the number of turns in the primary coil is

13000