Transistor Fundamentals: JFET Amplifiers
By Patrick Hoppe
Students read an explanation of the common-source and source-follower amplifiers. Gain formulas are developed and an example is given.
Potentiometer Application
By Terry Bartelt
In this animated and interactive object, learners examine how a variable voltage is obtained from a variable resistor that is wired as a potentiometer across a fixed DC power supply.
Power Law Practice Problems #2
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.
Wiring Integrated Circuits
Instructions on how to wire an integrated circuit are given.
Methods of Producing Electricity
In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.
Wattmeters
Learners examine the function of the analog wattmeter to measure true power, how it is connected in a circuit, and how the internal components develop a measurement. A brief quiz completes the activity.
Transistor DC Analysis Practice Problems: Circuit #4
Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.
Graphical BJT/JFET Transistor Biasing
By Roger Brown
Learners use two calculations to prepare a graphical solution to the biasing of bipolar junction transistors and junction field effect transistors. This method eliminates the problem of having to re-calculate the operational Q point when dealing with hard saturation.
DC/AC I: Unit 3 Sample Exam
In this interactive object, students answer 10 questions covering Ohm's Law and Power Law.
Exclusive-NOR Gate (Screencast)
In this learning activity you'll review the operation of an Exclusive-NOR gate by using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.
Transistor AC Analysis Practice Problem: Circuit #5
The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.
Sine Wave Fundamentals: Practice Problem #6
In this interactive object, learners determine the Vp, Vp-p, Vrms, Vavg, and the frequency of a sine wave that is displayed on an oscilloscope screen.
Sine Wave Fundamentals: Practice Problem #8
Series-Parallel Circuit Analysis Practice Problems: Circuit 8
Learners examine a series-parallel circuit and solve 14 problems related to voltage, current, and power. A help screen is provided.
DC/AC I: Unit 4 Sample Exam
In this interactive object, learners answer nine questions about series and parallel circuits. Immediate feedback is provided.
Sine Wave Fundamentals: Practice Problem #5
Pulse Train Fundamentals: Practice Problem #5
In this interactive object, learners determine the pulse width, period, duty cycle, and frequency of a waveform.
The Mathematical Expression of an AC Sine Wave As a Function of Time: Practice Problems
Students view the mathematical expression of a sinusoidal waveform with respect to time (t) and solve five problems. The answers are provided so students may check their work.
Sine Wave Fundamentals
Learners examine the characteristics of a sine wave and the various ways to describe it including Vp, Vp-p, Vrms, Vavg, and frequency.