Vernier Software and Technology
Vernier Software & Technology

RLC Circuits


You have studied the behavior of capacitors and inductors in simple direct-current (DC) circuits. In alternating current (AC) circuits, these elements act somewhat like resistors to limit current flow. The term used for the resistance these elements offer to current flow in AC circuits is reactance. The general term for the sum of all the resistance and reactance (both capacitive and inductive) in a circuit is impedance.

The reactance for a particular capacitor or inductor varies with the frequency of the circuit. Capacitors store energy in electric fields. When fully charged, they will not let current flow in a DC circuit. However, in AC circuits, as the frequency increases, their resistance to the flow of charge decreases. Inductors store energy in magnetic fields. In DC circuits, an ideal inductor has no resistance, but in AC circuits, its resistance increases with the frequency.

In this experiment, you will examine the behavior of an AC circuit containing a capacitor (C), an AC circuit containing a resistor and an inductor (RL), and an AC circuit containing all three elements (RLC).


In this experiment, you will

  • Learn the terms capacitive reactance, inductive reactance, and impedance.
  • Determine the relationship between the reactance and frequency for a capacitor.
  • Determine the relationship between the impedance and frequency of an RL circuit.
  • Determine the resonant frequency of an RLC circuit.
  • Experiment with resonance and energy transfer in an RLC circuit.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Advanced Physics with Vernier — Beyond Mechanics

See other experiments from the lab book.

1Behavior of a Gas
2Heat Engines
3Standing Waves on a String
4Standing Waves in a Column of Air
5Doppler Effect
7Coulomb's Law
8Mapping Electric Potential
9Factors Affecting Electrical Resistance
10Series and Parallel Circuits
11Faraday’s Law: Moving Magnet
12Faraday’s Law: Alternating Current
13Capacitors and Inductors
14RLC Circuits
15Curved Mirrors and Images
16Thin Lenses and Real Images
17Thin Lenses and Virtual Images
18Aperture and Depth of Field
21Spectrum of Atomic Hydrogen
22Planck’s Constant

Experiment 14 from Advanced Physics with Vernier — Beyond Mechanics Lab Book

<i>Advanced Physics with Vernier — Beyond Mechanics</i> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

Buy the Book

Dev Reference: VST0649

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