A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil.

Answer Details

The voltage ratio in a transformer is proportional to the number of turns in the primary coil and the number of turns in the secondary coil. Therefore, we can use this proportionality to find the number of turns in the secondary coil.
The voltage ratio is 240V (primary) to 12V (secondary), which is equal to 20.
So, the ratio of the number of turns in the primary coil to the number of turns in the secondary coil is also 20.
We are given the number of turns in the primary coil as 4000, so we can find the number of turns in the secondary coil as follows:
Number of turns in the secondary coil = (Number of turns in the primary coil) / (Voltage ratio)
Number of turns in the secondary coil = 4000 / 20 = 200
Therefore, the number of turns in the secondary coil is 200.