DC/AC I: Unit 10 Sample Exam
By Patrick Hoppe
Learners answer eight questions about capacitors. Help pages are available.
DC/AC I: Unit 11 Sample Exam
Learners answer six questions about transformers.
DC/AC I: Unit 12 Sample Exam
A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.
DC/AC I: Unit 2 Sample Exam
In this interactive object, learners work 10 problems covering resistors, voltage, and current.
DC/AC I: Unit 3 Sample Exam
In this interactive object, students answer 10 questions covering Ohm's Law and Power Law.
DC/AC I: Unit 4 Sample Exam
In this interactive object, learners answer nine questions about series and parallel circuits. Immediate feedback is provided.
DC/AC I: Unit 5 Sample Exam
Learners answer 14 questions about series-parallel DC circuits.
DC/AC I: Unit 8 Sample Exam
Students answer five questions concerning magnetism.
DC/AC I: Unit 9 Sample Exam
In this interactive object, learners answer nine questions about inductors.
DC/AC: Unit 1 Sample Exam
In this interactive object, learners work 11 problems covering atomic structure, conductors, and insulators.
Decimals to Fractions
By Jessie Lloyd
De-Energizing Time Constants of an RL Circuit
By Terry Bartelt
In this animated learning object, students examine current, voltage, and the magnetic field strength of a series RL circuit while it is de-energizing during five time constants. A quiz completes the activity.
Demultiplexers (Screencast)
In this animated object, learners examine the operation of a demultiplexer along with the data output and select lines. A brief quiz completes the activity.
Depth Measurement
By Kelly Curran
In this learning activity you'll review a visual overview of depth measurement using the depth micrometer.
Derivative Control Mode Analogy (Screencast)
In this animated object, learners view a race of two boats as an example of how the derivative function of a PID controller shortens the time duration of an operation.
Deriving the Formulas of the Power Wheel
By Ron Wallberg
Use Ohm's law, Watt's law, and the power equation to derive formulas for the DC power wheel.
Designing a Cylinder Dwell Circuit
This animated lesson shows how a ladder circuit uses timer-on delays to cause an extrusion machine to operate.
Designing a Ladder Diagram
By Terry Bartelt, Terry Fleischman
In this animated object, learners examine the design of a ladder circuit that provides manual control to a water pumping system. Students also study modifications to the circuit as the complexity of the system increases.
Designing a Reciprocation Circuit
This animated lesson an exercise that enables students to design a ladder logic circuit using a drag-drop function to cause the cylinder of a hydraulic circuit to extend and retract.
Determining Hydraulic Cylinder Size
Students read how to calculate the size of a hydraulic cylinder that is required for a particular application. Mathematical formulas are provided.
Determining Punch & Dies for Press Brake Forming
By Dave Hoffman
Introduction to selecting the proper punch and die for air bending or bottoming when forming on a press brake. Includes charts and methods for selection.
Development of a Boolean Expression for a Combinational Logic Circuit
Learners view an animated demonstration of how to determine the final output of the combinational circuit.
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.
Difference Op Amp
Learners examine the fundamental operation of a difference operational amplifier. A brief quiz completes the activity.
Digital Circuit Devices
The two types of digital devices, logic gates and flip-flops, and the types of basic operations they perform are presented.