Final answer:
When a magnet is moved in and out of a wire coil, voltage is created. If the coil has twice as many loops, the voltage induced is twice as much.
Step-by-step explanation:
When a magnet is moved in and out of a wire coil, voltage is created. This phenomenon is known as electromagnetic induction. According to Faraday's Law of Electromagnetic Induction, the magnitude of the induced voltage is directly proportional to the rate at which the magnetic field changes through the coil. Therefore, if the coil has twice as many loops, the voltage induced is twice as much as before.
Learn more about Electromagnetic Induction