Capacitors in Alternating-Current Circuits CAPACITIVE REACTANCE A capacitor connected to an ac supply repeatedly charges and discharges as the ac voltage changes direction. The charging current also alternates in direction as the capacitor charges and discharges. In the circuit in Figure 6–1, a 26.52-f.LF capacitor is connected across a 100-V, 60-Hz source. The ammeter indicates […]
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Alternating current fundamentals
Capacitors in Alternating-Current Circuits : Capacitive reactance , Leading current , Angle of phase defect , Voltage rating of a capacitor and Power in a capacitor.
Capacitors in Alternating-Current Circuits CAPACITIVE REACTANCE A capacitor connected to an ac supply repeatedly charges and discharges as the ac voltage changes direction. The charging current also alternates in direction as the capacitor charges and discharges. In the circuit in Figure 6–1, a 26.52-f.LF capacitor is connected across a 100-V, 60-Hz source. The ammeter indicates […]
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Capacitors and RC Time Constants : RL time constants , Applications of capacitors , Types of capacitors and Capacitor markings.
RL TIME CONSTANTS A discussion of time constants for RL series circuits is given here because the exponential curves and calculations involved are similar to those for RC series circuits. Current in an RL Circuit Any inductance coil is really a combination of inductance and resistance in series. If the coil is connected to a […]
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Capacitors and RC Time Constants : RL time constants , Applications of capacitors , Types of capacitors and Capacitor markings.
RL TIME CONSTANTS A discussion of time constants for RL series circuits is given here because the exponential curves and calculations involved are similar to those for RC series circuits. Current in an RL Circuit Any inductance coil is really a combination of inductance and resistance in series. If the coil is connected to a […]
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Alternating-Current Circuits Containing Resistance : Power in watts , Electrical energy , Measurement of energy and Average current and voltage
POWER IN WATTS In dc circuits, the power in watts is equal to the product of volts and amperes. For ac circuits, the power in watts at any instant is equal to the product of the volts and amperes at that same instant. However, the average power of ac circuits is not always the product […]
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Alternating-Current Circuits Containing Resistance : Power in watts , Electrical energy , Measurement of energy and Average current and voltage
POWER IN WATTS In dc circuits, the power in watts is equal to the product of volts and amperes. For ac circuits, the power in watts at any instant is equal to the product of the volts and amperes at that same instant. However, the average power of ac circuits is not always the product […]
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Inductance in Alternating-Current Circuits : Review of electromagnetism and Inductive reactance.
Inductance in Alternating-Current Circuits REVIEW OF ELECTROMAGNETISM Direct Current Fundamentals discussed the following two basic principles of electro- magnetism: (1) a magnetic field surrounds every current-carrying conductor or coil winding, and (2) an increase or decrease in the current causes an increase or decrease in the number of lines of force of this magnetic field. […]
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Inductance in Alternating-Current Circuits : Review of electromagnetism and Inductive reactance.
Inductance in Alternating-Current Circuits REVIEW OF ELECTROMAGNETISM Direct Current Fundamentals discussed the following two basic principles of electro- magnetism: (1) a magnetic field surrounds every current-carrying conductor or coil winding, and (2) an increase or decrease in the current causes an increase or decrease in the number of lines of force of this magnetic field. […]
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Series Circuits—Resistance and Impedance : Figure of merit
FIGURE OF MERIT It has been pointed out that inductor coils have some resistance. For commercial coils, the inductive reactance is the useful component. The effective resistance is the unwanted component, which must be held to as low a value as possible. The ratio of the inductive reactance in ohms to the effective resistance in […]
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Series Circuits—Resistance and Impedance : Figure of merit
FIGURE OF MERIT It has been pointed out that inductor coils have some resistance. For commercial coils, the inductive reactance is the useful component. The effective resistance is the unwanted component, which must be held to as low a value as possible. The ratio of the inductive reactance in ohms to the effective resistance in […]
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