Changing the number of coils on a transformer will change the voltage of the transformer. The number of coils on the primary and secondary windings of a transformer determine the voltage ratio of the transformer. The voltage ratio is calculated by dividing the number of turns on the secondary winding by the number of turns on the primary winding.For example, if a transformer has 100 turns on the primary winding and 200 turns on the secondary winding, the voltage ratio will be 2:1. This means that the voltage on the secondary winding will be twice the voltage on the primary winding.To change the number of coils on a transformer, you can either add or remove coils from the primary or secondary windings. Adding coils to the primary winding will increase the voltage ratio, while adding coils to the secondary winding will decrease the voltage ratio. Removing coils from the primary winding will decrease the voltage ratio, while removing coils from the secondary winding will increase the voltage ratio.It is important to note that the voltage ratio of a transformer is not the same as the turns ratio. The turns ratio is simply the ratio of the number of turns on the secondary winding to the number of turns on the primary winding. The voltage ratio takes into account the effects of the magnetic field in the transformer, which can cause the voltage on the secondary winding to be different from what would be expected based on the turns ratio alone. Flag for review