With a transformer that has 1000 turns in the primary and 2000 turns in the secondary, what will be the output voltage if 120 volts are supplied?

To determine the output voltage of a transformer based on the number of turns in the primary and secondary coils, the turns ratio is key. The turns ratio is calculated by dividing the number of turns in the secondary coil by the number of turns in the primary coil.

In this scenario, the transformer has 1000 turns in the primary coil and 2000 turns in the secondary coil. This yields a turns ratio of 2000/1000, or 2:1. This means that for every 1 volt in the primary, there will be 2 volts in the secondary.

When 120 volts are supplied to the primary coil, the output voltage in the secondary coil can be found by multiplying the primary voltage by the turns ratio. Here, you would calculate it as follows:

Output Voltage = Input Voltage × Turns Ratio

Thus: Output Voltage = 120 volts × 2 = 240 volts.

Therefore, the correct output voltage when 120 volts is supplied to the primary coil of this transformer with the given turns ratio is indeed 240 volts.