Physics for IGCSE & O level - Magnets And Currents (Section 7 - No. 23)
Which of the following is a practical application of a transformer?
Changing the voltage of your mobile charger.
Converting AC to DC.
Generating electricity from a moving magnet.
Storing electrical energy.
Vysvětlení
Mobile phone chargers utilize transformers to step down the voltage from the wall outlet.