Question
A student places a metal coil between the poles of two magnets and connects a bulb to a stand. The student rotates the coil using a handle and observes that the bulb glows, as shown below.
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How does the student’s device model a generator?
When the coil is held still between the magnetic poles, a current is produced in the coil to power the light bulb.
When the coil moves between the magnetic poles, a current is produced in the coil to power the light bulb.
When the coil rotates between the magnetic poles, it creates a magnetic field to produce electric current to power the light bulb.
When the coil is placed between the magnetic poles, the magnets behave like a battery to power the light bulb.
image.png
How does the student’s device model a generator?
When the coil is held still between the magnetic poles, a current is produced in the coil to power the light bulb.
When the coil moves between the magnetic poles, a current is produced in the coil to power the light bulb.
When the coil rotates between the magnetic poles, it creates a magnetic field to produce electric current to power the light bulb.
When the coil is placed between the magnetic poles, the magnets behave like a battery to power the light bulb.
Answers
GPT-5 mini
When the coil moves between the magnetic poles, a current is produced in the coil to power the light bulb.
Explanation: rotating the coil changes the magnetic flux through it, which (by Faraday's law of electromagnetic induction) induces an emf and current that lights the bulb. If the coil is held still there is no changing flux and no induced current.
Explanation: rotating the coil changes the magnetic flux through it, which (by Faraday's law of electromagnetic induction) induces an emf and current that lights the bulb. If the coil is held still there is no changing flux and no induced current.