16.360 Lecture 24

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16.360 Lecture 24
Exam III, Nov. 24, Monday, 1230 130pm, SW 401,
Chapter 3, 4, 5
Last Lecture

• Dynamic Filed
• Faradays Law
• Stationary loop in a time-varying Magnetic field

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16.360 Lecture 23
Static field
Dynamic Field
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16.360 Lecture 23
Faradays Law
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16.360 Lecture 23
Electromotive force
Stationary Loop in a Time-varying Magnetic field
Lenzs law
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16.360 Lecture 23
Faradays law, differential form
An example
(a) The magnetic flux link of a single turn of
the inductor.
(b) The transformer emf,.
(c) The polarity of the emf.
(d) The induced current.
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Example II
Determine the voltage drops across the two
resistors
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16.360 Lecture 24
Today

• The ideal Transformer
• Moving Conductor in a Static Magnetic Field

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16.360 Lecture 24
The ideal Transformer properties

• ? ?
• I 0 in the core.
• The magnetic flux is confined within the core

Questions

• I ?, with applied voltage of V1and with RL
• V2, and I2?

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16.360 Lecture 24
Voltage transformer
Power relations
Why?
Current transformer
Impedance transformer
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16.360 Lecture 24
Moving conductor in a static magnetic field
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16.360 Lecture 24
Another way to look at it
Next lecture

• The electromagnetic generator
• Moving conductor in a time varying magnetic field