Resistor Inductor
Resistor Inductor - Related Videos
11:34
Series and Parallel Resistors
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN This experiment demonstrates how current is distributed in resistors connected in series or parallel, and thus describes how to calculate the total "effective" resistance. Using Ohm's law, it possible to convert between the voltage and current through a resistance, if the resistance is known. For two resistors connected in series, (meaning that they are wired one after the...
01:11
Inductors
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2024
An inductor is a passive component built to store energy within its magnetic field. It can be fabricated by coiling a wire around a magnetic core. When current is permitted to flow through this inductor, it is observed that the voltage across the inductor is directly proportional to the time rate of change of the current. Mathematically, This relationship is expressed using the passive sign convention, where 'L' represents the constant of proportionality, also known as the inductance of the...
01:20
Inductors
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2026
An inductor, also known as a choke, is a circuit component created to have a specific inductance. Inductors are among the crucial circuit components used in modern electronics, along with resistors and capacitors. They serve as a barrier against changes in a circuit's current. An inductor tends to suppress current changes in an alternating-current circuit that are faster than desired. In a direct-current circuit, an inductor aids in preserving a constant current despite changes in the applied...
01:10
Resistors In Series
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2023
A resistor is an ohmic device that limits the flow of charge in a circuit. Most circuits have more than one resistor. If several resistors are connected together and connected to a battery, the current supplied by the battery depends on the equivalent resistance of the circuit. The equivalent resistance of a combination of resistors depends on both their individual values and how they are connected. The simplest combination of resistors is the series combination. In a series circuit, the...
01:18
Combination Of Resistors
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2023
Electrical devices in any circuit can be connected either by series or parallel connections. Additionally, circuits can be connected involving both of these connections, known as combination or complex circuits. As these circuits have complex resistor connections, it is necessary to identify different parts as either series or parallel connections, then the whole combination of series and parallel resistors can be reduced to a single equivalent resistance. With the known equivalent resistance...
FAQs
The resistor and inductor shape the transient in different ways: resistance limits the current and converts electrical energy to heat, while inductance stores energy in a magnetic field. During energizing, these effects act together, producing a current that changes progressively rather than instantly. The circuit therefore provides a direct way to observe how dissipation and magnetic energy storage interact.
The time constant, τ = L/R, is a measure of response speed. Increasing inductance makes τ larger, so the current approaches its steady behavior more slowly; increasing resistance makes τ smaller, so the response occurs more quickly. Comparing circuits with different L or R allows investigators to relate measured transient timing to component values.
When the source is removed, the inductor’s stored magnetic energy does not disappear without producing an electrical effect. As the magnetic field collapses, it drives current through the circuit, while the resistor provides a path for energy dissipation as heat. This release phase shows why inductance affects the behavior of circuits during and immediately after switching.
An investigation can follow the circuit through two phases. First, apply a voltage and observe how the current rises; then remove the source and observe the response produced by the collapsing magnetic field. Recording the timing of both changes lets researchers examine electromagnetic transients and evaluate how resistance and inductance shape current behavior.
Transient observations can reveal the circuit’s characteristic time scale through τ = L/R. A response that changes over a larger time scale indicates a larger time constant, whereas a smaller one indicates a faster approach to steady behavior. This interpretation connects the observed current response with the resistor and inductor values rather than treating it as an isolated measurement.
Beyond laboratory demonstrations, resistor-inductor circuits support filtering, current control, switching, and energy-management applications. Their usefulness comes from the predictable combination of current limitation, magnetic energy storage, and time-dependent response. Designers can therefore use the circuit’s transient behavior when a system must moderate current changes, handle stored energy, or respond over a selected time scale.