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DC chopper
This is one stage conversion device which is used for direct conversion of fixed de voltage at a level to an adjustable dc voltage at another level.
Figure DC Chopper
Chopper is high speed on/ off semiconductor switch is represented by a switch SW with an arrow as shown no current will flow if the switch is off and when it is on current will flow in the direction of arrow only.
Difference between linear and non-linear resistors
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A selection form an application's menu, or a command typed in by the user, like at a DOS prompt or at the Run dialog box in Windows.
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