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Define magnetic circuit. Draw simple series magnetic circuit.

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Describe the difference between direct and alternating current.

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1 Answer

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Particulars
Direct Current
Alternating Current
1. Waveform
image
image
2. Definition
It is the current whose magnitude and direction do not change with respect to time. 
It is the current whose magnitude and direction continuously changes with respect to time.
3. Use of transformer
Not possible
Possible
4. Design of machines
Complicated
Simple
5. Frequency
Zero
It is 50 Hz or 60 Hz depending upon country.
6. Obtained from
Battery, Cell and DC Generator
Alternator
7. Passive parameters
Resistance only
Resistance, Inductance, Capacitance.
8. Applications
DC machines, HVDC system, electroplating, Battery charging, Traction.
AC machines, Domestic and industrial supply.

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