A coil of wire is moved rapidly into a region with a strong magnetic field. Which change will most likely increase the magnitude of the induced current in the coil?
Increasing the speed at which the coil enters the magnetic field
By Faraday's law of electromagnetic induction, the induced EMF (and hence current) is proportional to the rate of change of magnetic flux. Increasing the speed at which the coil enters the field increases the rate of change of flux, increasing the induced current.
Hence, increasing the speed at which the coil enters the magnetic field increases the induced current.
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Important Questions from Magnetism
- The magnetic field around a straight current-carrying conductor:
Magnetic field is a quantity that has___________________ .
- The right-hand thumb rule is used to find which of the following?
- How are the magnetic field lines arranged inside a current-carrying solenoid?
- What does it mean when magnetic field lines are drawn closer together in a diagram?
