Electrical Wiring: Residental - With Plans (Paperback) Package
18th Edition
ISBN: 9781305416376
Author: MULLIN
Publisher: Cengage
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Chapter 20.2, Problem 13R
To determine
Mention the minimum branch-circuit rating for the demand range of
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Three types of electric devices A, B, and C are connected in series across a 115-volt a-c source, and the voltage drops across the individual units are equal. If Eв leads EA by 90 electrical! degrees_____Ec______behind Ex by 90 electrical degrees, what are the emfs across A,B,and C?
Connect the initial circuit as shown in Figure 47-1.2. Set VA at 20 volts. Insert a jumper wire between points A and B and observe the meter action.OBSERVATION Current flowed for approximately ___________ seconds as evidenced by the voltagemeasured across R. The rate of charge was (linear, nonlinear) __________________.nCONCLUSION The current that flowed was the charging current that charged the capacitor to avoltage equal to (VR, VA) ____________________. Was charging current maximum atthe beginning of the charge time or near the end? _________. At the beginning of thecharge time, the voltage across R was equal to (VC , VA) _______________________(the first instant). At the end of the charge time, the voltage across the resistor is________ volts; the voltage across the capacitor is equal to VA.
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Electrical Wiring: Residental - With Plans (Paperback) Package
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