Induced Electric Fields
9.4 Induced Electric Fields
Learning Objectives
By the end of this section, you will be able to:
- Connect the relationship between an induced emf from Faraday’s law to an electric field, thereby showing that a changing magnetic flux creates an electric field
- Solve for the electric field based on a changing magnetic flux in time
Induced Electric Fields
Practice!
| Practice 9.4.1 |
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| An electric field of 4.0 µV/m is induced at a point 2.0 cm from the axis of a long solenoid (radius = 3.0 cm, 800 turns/m). At what rate is the current in the solenoid changing at this instant? |
| Practice 9.4.2 |
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| A long solenoid has a radius of 2.0 cm and has 700 turns/m. If the current in the solenoid is decreasing at the rate of 8.0 A/s, what is the magnitude of the induced electric field at a point 2.5 cm from the axis of the solenoid? |
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