Series Circuits — Resistance and Impedance EFFECTIVE RESISTANCE The effective resistance is the resistance that a circuit or component offers to alternating current. Also known as ac resistance, it may vary with the frequency, current, or voltage of the circuit. Effective resistance must not be confused with impedance. The quantity resulting from the combination of […]
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Alternating current fundamentals
Series Circuits—Resistance and Impedance : Effective resistance , Skin effect , Eddy current losses , Hysteresis losses and Dielectric losses.
Series Circuits — Resistance and Impedance EFFECTIVE RESISTANCE The effective resistance is the resistance that a circuit or component offers to alternating current. Also known as ac resistance, it may vary with the frequency, current, or voltage of the circuit. Effective resistance must not be confused with impedance. The quantity resulting from the combination of […]
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Capacitors and RC Time Constants : Introduction and Capacitance.
Capacitors and RC Time Constants INTRODUCTION Direct Current Fundamentals explained how a material is a conductor or an insulator because of its atomic structure. It was stated that electrons are loosely held in the outer electron shells of each atom of a good conductor such as copper. Only a small force is required to dislodge […]
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Capacitors and RC Time Constants : Introduction and Capacitance.
Capacitors and RC Time Constants INTRODUCTION Direct Current Fundamentals explained how a material is a conductor or an insulator because of its atomic structure. It was stated that electrons are loosely held in the outer electron shells of each atom of a good conductor such as copper. Only a small force is required to dislodge […]
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Series Circuits—Resistance and Impedance : Resistance and inductance in series.
RESISTANCE AND INDUCTANCE IN SERIES Unit 3 discussed series circuits containing only resistance and pure inductance. It is not possible for a circuit to have pure inductance because the coils of inductive equipment all have resistance. To obtain high values of inductance, iron cores are usually required. However, eddy currents and hysteresis losses in iron […]
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Series Circuits—Resistance and Impedance : Resistance and inductance in series.
RESISTANCE AND INDUCTANCE IN SERIES Unit 3 discussed series circuits containing only resistance and pure inductance. It is not possible for a circuit to have pure inductance because the coils of inductive equipment all have resistance. To obtain high values of inductance, iron cores are usually required. However, eddy currents and hysteresis losses in iron […]
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Inductance in Alternating-Current Circuits : Vector addition and subtraction , Resistance and inductive reactance in series and Power and power factor.
VECTOR ADDITION AND SUBTRACTION The use of vectors simplifies the analysis of circuit conditions. The student should have a basic working understanding of vector diagrams and how they can aid in the solution of circuit problems. Many physical quantities, such as cubic inches, pounds, minutes, and degrees, are expressed in specific units. These quantities do […]
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Inductance in Alternating-Current Circuits : Vector addition and subtraction , Resistance and inductive reactance in series and Power and power factor.
VECTOR ADDITION AND SUBTRACTION The use of vectors simplifies the analysis of circuit conditions. The student should have a basic working understanding of vector diagrams and how they can aid in the solution of circuit problems. Many physical quantities, such as cubic inches, pounds, minutes, and degrees, are expressed in specific units. These quantities do […]
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Alternating-Current Circuits Containing Resistance : Current and voltage in phase , Heating effect of an alternating current , Effective (RMS) voltage and Resistance
Alternating-Current Circuits Containing Resistance CURRENT AND VOLTAGE IN PHASE A simple alternating-current circuit consists of resistance only. Either an incandescent lighting load or a heating load, such as a heater element, is a noninductive resistive load. Operation of an AC Generator In Figure 2–1, an ac generator supplies current to a 100-ohm (D) heater element. […]
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Alternating-Current Circuits Containing Resistance : Current and voltage in phase , Heating effect of an alternating current , Effective (RMS) voltage and Resistance
Alternating-Current Circuits Containing Resistance CURRENT AND VOLTAGE IN PHASE A simple alternating-current circuit consists of resistance only. Either an incandescent lighting load or a heating load, such as a heater element, is a noninductive resistive load. Operation of an AC Generator In Figure 2–1, an ac generator supplies current to a 100-ohm (D) heater element. […]
Continue reading…