Delmar's Standard Textbook of Electricity (MindTap Course List)
6th Edition
ISBN: 9781285852706
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 22, Problem 1RQ
In a pure capacitive circuit, does the current lead or lag the voltage?
Expert Solution & Answer
To determine
Whether the current leads or lags the voltage in a pure capacitive circuit.
Answer to Problem 1RQ
In a pure capacitive circuit, the current leads the applied voltage by .
Explanation of Solution
Description:
As can be seen from the above figure,
At 0°, value for the applied voltage is zero, while the graph for current is at its positive peak.
At 90°, value for the applied voltage is at its positive peak , while the graph for current is at zero.
At 180°, value for the applied voltage is zero, while the graph for current reaches negative peak.
At 270°, value for the applied voltage reaches negative peak, while the graph for current rises towards zero from the negative peak.
From the above pattern it can be interpreted that current leads the applied voltage by in pure capacitive circuit.
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Chapter 22 Solutions
Delmar's Standard Textbook of Electricity (MindTap Course List)
Ch. 22 - In a pure capacitive circuit, does the current...Ch. 22 - A series circuit contains a 20- resistor and a...Ch. 22 - An RC series circuit has a power factor of 76%....Ch. 22 - An RC series circuit has a total impedance of 84 ....Ch. 22 - A capacitor has a capacitive reactance of 50 when...Ch. 22 - A 15-F AC capacitor is connected in series with a...Ch. 22 - An RC series circuit is connected to a 120-V,...Ch. 22 - An RC series circuit is connected to a 240-V,...Ch. 22 - Refer to the formulas in the Resistive-Capacitive...Ch. 22 - Assume that the voltage drop across the resistor,...
Ch. 22 - Assume the circuit shown in Figure 221 has an...Ch. 22 - Assume the circuit in Figure 22-1 has a power...Ch. 22 - In a series RC circuit, ET=240 volts, R=60, and...Ch. 22 - In a series RC circuit, ET=120 volts, R=124, and...Ch. 22 - In a series RC circuit, ET=208 volts, IT=2.4...Ch. 22 - In a series RC circuit, ET=460 volts and =44. Find...Ch. 22 - In a series RC circuit, ET=240 volts at 60 Hz. An...Ch. 22 - In a series RC circuit, the apparent power is 4250...
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