Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: An electric motor is a device that uses an electromagnet to change electrical energy to kinetic energy. When current flows through the motor, the electromagnet rotates, causing a shaft to rotate as well. The rotating shaft moves other parts of the device. Answer: electric motor
A:
What device uses an electromagnet to change electrical energy to kinetic energy?