(See related pages)
After studying this chapter, you should be able to:
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• Define the terms magnetomotive force and field intensity and list the units of each. |
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• Explain the B-H magnetization curve. |
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• Define the term saturation as it relates to a magnetic core. |
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• Explain what is meant by magnetic hysteresis. |
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• Describe the magnetic field of an electric current in a straight conductor. |
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• Determine the magnetic polarity of a solenoid using the left-hand rule. |
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• Explain the concept of motor action. |
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• Explain how an induced voltage can be developed across the ends of a conductor that passes through a magnetic field. |
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• State Lenz’s law. |
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• Using Faraday’s law, calculate the induced voltage across a conductor being passed through a magnetic field. |
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• Explain the basic construction and operation of an electromechanical relay. |
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• List and explain some important relay ratings. |