A researcher uses a transformer to increase the voltage of a low-voltage electrical current. What is the principle behind the transformer's functioning?
Q1. A researcher uses a transformer to increase the voltage of a low-voltage electrical current. What is the principle behind the transformer's functioning?
Answer: Electromagnetic induction causing a change in voltage
Explanation: Electromagnetic induction causes a change in voltage, which is increased as the current is transferred from the primary coil to the secondary coil, whereas the other options describe different principles used in different components or functions in a transformer.