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23.6 Back Emf
The angular velocity can be used to find.
The quantities are known.
1000rpm is exactly 104.7 rad/s.
The average emf of 131 V should be greater than the maximum emf.
Electric generators look a lot different than the figures in this section, but the principles are the same.
The source of mechanical energy that turns the coil can be falling water, steam, or wind.
The steam produced by burning coal causes the turbine blades to turn.
The generators in this section look similar to the ones shown in the previous section.
When the shaft rotates, a motor becomes a generator.
Some early automobiles had a starter motor.
We will explore the action of a motor as a generator.
Motor and generator are very similar.
Generators convert mechanical energy into electrical energy.
Both generators and motors have the same construction.
When the coil of a motor is turned, an emf is created.
Whenever the coil rotates, the motor acts as a generator.
The shaft can be turned by an external input, like a belt drive, or by the action of the motor.
When a motor is doing work and its shaft is turning, an emf is generated.
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