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ZingPath: Electromagnetic Force and Induction

Induced Current

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Electromagnetic Force and Induction

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Lesson Focus

Induced Current

Physics

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You get to learn about electromagnetic induction and its applications. Experiment with induced fields and use your new knowledge to design a winning electric race car.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Explain how changes in a magnetic field create a current.

Everything You'll Have Covered

In the example in the animation, what is the magnetic flux and why does the magnetic flux vary when the magnet is pushed near the coppering?

~ In the example in the animation, the magnetic flux is the total magnetic field that is passing through the inside of the ring. The magnetic flux varies when the magnet is pushed near the ring as a result of the change in magnetic field strength threading through the ring.

How does a change in magnetic flux lead to the production of a magnetic field?

~ When there is a change in magnetic flux, the circular copper ring attempts to compensate for the change by generating an induced current that, in turn, produces a magnetic field in the opposite direction inside the ring.

Why does the moving magnet produce electric force?

~ A change in magnetic flux generates an induced current on the ring and it produces a magnetic field inside the ring. Since the magnetic field produced by the induced current and the external magnetic fields are in opposite directions, they push against each other, causing the conductive ring to move.

What are the two methods that can be used to generate a steady induced current?

~ A steady induced current can be generated by either continually changing the strength of the external magnetic field or rotating the conductive ring in the magnetic field.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should have a general understanding of area, conductor, and current.
Course Physics
Type of Tutorial Animation
Key Vocabulary area, conductor, current