This lesson covers the fundamental aspects of motor-generators in machines, focusing on the principles of linear generators or motors. It explains the concept of a conductor moving in a magnetic field and the resulting induced voltage. The lesson also discusses the application of Fleming's right-hand rule to determine the magnitude and polarity of the voltage, and Fleming's left-hand rule to ascertain the force when a conductor carries current in a magnetic field. The lesson further illustrates these principles with an example of a conductor moving on a frictionless track in a magnetic field.

- A conductor moving in a magnetic field with some velocity will have an induced voltage. The polarity of this induced voltage can be determined using Fleming's right-hand rule.
- When a conductor carrying current is placed in a magnetic field, it experiences a force. The magnitude and direction of this force can be determined using Fleming's left-hand rule.
- The magnitude of the force experienced by a conductor carrying current in a magnetic field is given by the product of the magnetic field strength (B), the current (I), and the length of the conductor (L).
- The principles of motor-generators are fundamental to understanding the operation of various machines.

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