Transformer Loading

By Terry Bartelt

In this animated activity, learners see that changing the resistance value of the load in the secondary of a transformer causes current to vary in the primary.

Reactive Power

Students read an explanation of reactive power in a power distribution system involving motors, generators and transformers. A brief quiz completes the activity.

Opens Affecting Current in a Series Circuit

In this learning activity you'll review how an open in a series circuit affects current.

Inductors

By Patrick Hoppe

Learners read a description of inductors and view examples of inductors in series and in parallel.

Transistor Fundamentals: Base-Biased NPN Transistor

Students view a dc analysis of a base-biased NPN transistor.

The 555 Astable Multivibrator

Learners observe the animated operation of an astable mulivibrator using a 555 IC (integrated circuit) chip and external components.

How Adding Parallel Branches Decreases Total Resistance

In this animated object, learners follow an analogy of water flowing through pipes and valves to see how resistance decreases in a parallel circuit as branches are added.

Current Divider Rule (CDR)

Students review the Current Divider Rule (CDR) and work practice problems.

Dielectric Constant

This learning activity presents information on how the type of material used for the dielectric of a capacitor affects the capacitor's value in farads.

Capacitive Reactance Practice Problems

Students solve problems on the determination of total capacitive reactance of series-parallel capacitors.

Oscilloscope Phase Shift Measurements

In this animated lesson, learners follow the steps required to read the phase shift difference in degrees between two AC waveforms.

Automotive Electrical Systems: Ohm's LawPractice Problems #2

By Andrew Rinke, Patrick Hoppe

Learners review Ohm's Law and then work 12 problems to help them apply the law to automotive electrical systems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and are asked to solve for the third.

Schematic Diagram Symbols

In this learning activity you'll review various types of common components used in electronics and view their schematic diagram symbols.

Thevenin Resistance: Practice Problems

Students work five practice problems to determine the Thevenin resistance of DC circuits.

Effects of a Rheostat in a Series Circuit

In this animated object, learners examine how the way in which a rheostat is connected in series with other resistors causes current and voltage to change as the resistance is varied. A brief quiz completes the activity.

AND Gates

In this learning activity you'll describe the operation of an AND gate by using a truth table, a waveform diagram, a Boolean Algebra equation, a switch analogy, and a written definition.

The 7493 IC Binary Counter

In this interactive and animated object, learners examine the construction of a 7493 IC as mod-2 and mod-8 up-counters. They view how this binary counter can be modified to operate at different modulus counts. A quiz completes the activity.

Pulse Train Fundamentals: Practice Problem #1

In this interactive object, learners determine the pulse width, period, duty cycle, and frequency of a waveform.

Summing Op Amp

In this animated object, learners examine the operation of a summing operational amplifier through formulas, tables, and animated illustrations. A brief quiz completes the activity.

Internal Elements of a 555 Timer

In this highly interactive object, learners examine the internal elements of a 555 IC and their operation. Learners then test their knowledge in a variety of exercises.

The Transfer Function and Frequency Response of a Low Pass Filter

Students learn how to predict how circuits will respond to varying frequency. They solve for the magnitude and phase angles.

Complex Power

The student studies the method to calculate complex power where the Vrms of a circuit is multiplied by the complex conjugate of the total circuit current. Several examples are given, along with the power triangle.

Comparing Analog and Digital Signals

Learners compare animations of analog and digital data signals. A short quiz completes the activity.

ElectroMagnetic Radio Waves

In this animated object, learners examine how magnetic waves are transmitted as radio signals.

Kirchhoff's Current Law - Parallel Circuits

In this learning activity you'll explore Kirchhoff's Current Law and view examples of its application.