How Metal Detectors Operate
By Terry Bartelt
Learners examine how metal detectors function. This object includes animation and sound.
Operation of Full-Wave Bridge Rectifier
By Matthew Treu
In this learning activity you'll explore the operation of a full-wave bridge rectifier circuit.
Transistor Fundamentals: JFET Drain Curves
By Patrick Hoppe
Students examine the drain curves for a JFET. They are also introduced to vocabulary terms and formulas.
Total Impedance of a Series Circuit Using Complex Numbers: Practice Problems
Students solve six problems for series impedance using complex numbers. Immediate feedback is given.
Oscilloscope: DC Voltage Measurements
Learners follow step-by-step instructions for using an oscilloscope to measure DC voltages.
Impedance: Series to Parallel Conversion
Students view the formulas to be used to convert a series impedance to a parallel impedance.
The Bridge Rectifier
Learners see how a bridge rectifier converts an AC voltage into a pulsating DC voltage. A brief quiz completes the activity.
Op Amp Comparator (Screencast)
Students read an explanation of the operation of an operational amplifier that functions as a comparator.
Transformer Practice Problems
Students solve practice problems on voltage, current, and impedance matching. Examples precede the problems.
Power Law Practice Problems #4
Learners review the three formulas for power and work 12 problems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and asked to solve for power. Immediate feedback is provided.
Parallel Resistance Practice Problems
Students work practice problems in which the total resistance of the circuit is calculated. Feedback is provided.
Voltage Measurements of a Half-Wave Rectifier
In this animated lesson, students view how an oscilloscope and a DC voltmeter measure the voltage of a half-wave rectifier.
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.
Instantaneous Voltage Calculations of a Discharging RC Circuit (Using a TI-35X or a TI-36X Calculator)
In this animated object, learners view the keystrokes on a TI-35X/36X calculator that are required to solve for the instantaneous voltage of a discharging RC circuit.
Silicon Diode Basics
This primer introduces the student to the key terms and concepts associated with the silicon diode.
Basic DC Electrical Motor Construction
Learners examine the internal parts of a DC electrical motor and then text their knowledge in a drag-and-drop exercise.
The Basic Operation of a Diode
In this interactive and animated object, learners examine the operation of a semiconductor diode when it is forward and reverse biased. A brief quiz completes the activity.
Series Resistance Practice Problems
Students work practice problems to calculate the total resistance of a circuit. Feedback is provided.
Inductive Reactance Demonstration 2
In this animated object, learners examine how a coil of wire provides more resistance to AC current flow than an uncoiled wire. This learning object contains audio.
The Function Generator: Voltage Control
Learners read a description of the knob controls, pushbuttons and output terminals on the Wavetek Model 25 signal generator.
The RC Time Constant
Learners examine the concept of the RC time constant. The instantaneous voltage across the capacitor is calculated.
Synchronous Motors
By Terry Bartelt, Terry Fleischman
In this animated object, learners study how the internal parts of an AC synchronous motor interact with magnetic fields to cause rotation. A short quiz completes the activity.
DC/AC I: Unit 11 Sample Exam
Learners answer six questions about transformers.
Thevenin Resistance: Practice Problems
Students work five practice problems to determine the Thevenin resistance of DC circuits.
Inductance
This learning activity describes the physical properties that affect the inductance, in henries, of an inductor.