The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.

In this learning activity you'll review methods for testing an on/off switch with an ohmmeter and a voltmeter.

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

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

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.

Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.

Students read an introduction to inductive reactance and view examples.

In this animated object, learners drag resistors of the proper value into a series circuit to cause a required amount of current to flow. Seven review questions complete the activity.

A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.

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

Instructions on how to interpret state indicator symbols for input and output terminals of digital devices is presented.

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.

In this interactive object, learners work 10 problems covering resistors, voltage, and current.

In this interactive object, students answer 10 questions covering Ohm's Law and Power Law.

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.

Learners read a description of the DC offset function, the 50 ohm and 600 ohm output terminals, and the TTL/CMOS output terminal.

Students calculate current, phase angle, resistor voltage, inductor voltage, and power.

Learners examine the fundamentals of a pulse train. Concepts such as time on, time off, duty cycle, period, and frequency are covered.

The ohmic region of the E-MOSFET is identified. Formulas are given to determine the proper operation in the ohmic region. An example of circuit analysis is also given.

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.

In this learning activity you'll review the steps for determining the total capacitance of a parallel circuit and work practice problems.

Students view the formulas to be used to convert a parallel impedance to a series impedance.

Learners examine first and second approximations and view examples of a "stiff" current source.

Learners examine the wiring of the primary components of the three types of DC motors, series, shunt, and compound. The operational characteristics of each type of motor are described. A quiz completes the activity.