2. A step-down transformer has 200 turns of wire in its primary coil. How

Question

many turns are in the secondary coil if the input voltage = 120 V, and the
output voltage = 6 V?

Answer 1

The turns ratio between the primary and secondary coils can be found using the formula:

Turns ratio = input voltage / output voltage

Turns ratio = 120 V / 6 V
Turns ratio = 20

Since the turns ratio is equal to the ratio of turns in the primary coil to turns in the secondary coil, we can set up the following equation:

Turns in primary coil / Turns in secondary coil = 20

Given that there are 200 turns in the primary coil, we can substitute these values into the equation:

200 / Turns in secondary coil = 20

Solving for Turns in secondary coil:

Turns in secondary coil = 200 / 20
Turns in secondary coil = 10

Therefore, the number of turns in the secondary coil is 10.