Students examine the first and second approximations of a voltage source. A "stiff" voltage source is defined, and several examples are given.

In this learning activity you'll explore the effect of connecting voltage sources in series to increase voltage applied to a load.

In this animated lesson, students view how an oscilloscope and a DC voltmeter measure the voltage of a half-wave rectifier.

In this learning activity you'll determine the voltages that can be topped off of a multi-resistor voltage divider that has one main power source.

In this interactive object, learners examine how voltages and currents vary in a parallel LC circuit as the applied frequency changes.

Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.

This is an animated troubleshooting exercise that takes voltage measurements to determine the fault of three different series circuits. There are six review questions that enable the learner to determine the effectiveness of the troubleshooting presentation.

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

Learners view an animated explanation of why an adjustment of the output voltage by an AC drive is required to maintain a constant torque as the frequency is varied.

Students review the Voltage Divider Rule and work practice problems.

The effect of connecting voltage sources in parallel to increase amperage to a load is presented.

In this learning activity you'll explain how voltage and resistance in a series circuit affect current flow.

Students read a step-by-step approach on how to connect a voltmeter to a circuit when making a measurement.

Learners examine how voltages and currents vary in a series RLC circuit as the applied frequency changes.

In this animated and interactive object, learners examine why the voltage produced by an AC drive must be increased when its frequency is increased due to inductive reactance.

The learner will understand how a zener diode maintains a constant voltage as the resistance values of a load change.

In this interactive and animated object, learners examine how dc voltages develop across capacitors that are connected in series and in parallel.

In this animated activity, learners examine how the speed of a motor may change if the voltage from the power source fluctuates due to power line irregularities. This lesson has audio content.

In this learning activity, learners will learn to calculate the average voltage produced by half-wave and full-wave rectifiers.

Learners review the VDR and work six problems. Immediate feedback is given.