Question

Which group consists entirely of technologies that work on electromagnetic induction?

Options

• Generators, transformers, induction motors, and wireless chargers

• Electric lights, trains, telephones, and personal computers

• Trains, communication networks, magnetic compass needles, and conductors

• Conductors, closed coils, solenoids, and magnetic compass needles

Answer 1

Generators, transformers, induction motors, and wireless chargers work on electromagnetic induction. In each case, the principle involves electric current produced by a changing magnetic field.