Students answer five questions concerning magnetism.

Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.

Students read how to lock a cell that is being referenced in a formula so that it does not automatically show an increment when the formula is copied.

Learners view an animated explanation of why an adjustment of the output voltage by an AC drive is required to maintain a constant torque as the frequency is varied.

Describe the inverting op-amp configuration and calculate the circuit gain.

In this animated object, learners examine the operation of a zener diode in the forward and reverse bias conditions. A quiz completes the activity.

In this animated learning object, students view the operation of an oscilloscope that is used to measure AC voltages. A brief quiz completes the activity.

In this animated object, students view an explanation of how current, voltage, and the charge on a capacitor of a series RC circuit change during five time constants. A short quiz completes the activity.

In this interactive object, learners practice their 3D visualization skills by identifying the correct isometric view of an object. Front, side, and top orthographic views are shown.

In this interactive object, learners read the common abbreviations used in engineering drawings and then test their knowledge in three short exercises.

Students read how to use the IMCONJUGATE() function to convert complex numbers to their conjugate in rectangular form.

In this learning activity you'll explore the effect of connecting voltage sources in series to increase voltage applied to a load.

In this interactive object, students complete progressively more difficult exercises as a way to improve their ability to recognize resistor color code values.

This learning object introduces the student to the calculations involved in a sieve analysis -- including percentage retained and percentage passed.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Learners view a vector diagram for a series RL circuit. Information on the voltage across each component, the total voltage, and the phase angle is included.

Learners use the National Electrical Code to determine the size of a motor overload protection device.

Learners study an animated block diagram that describes the function of each element in a closed-loop system used in industrial automation.

Students read how to determine and calculate the saturated density for a given sample of soil or aggregate, based on the mass-volume relationship. Practice problems complete the activity.

Learners examine how voltages and currents vary in a series RLC circuit as the applied frequency changes.

Students view a graphical explanation of how the motor condition (unloaded, 50 percent loaded, fully loaded) affects the phase between voltage and current, the current draw from the AC supply, the amount of power consumed, and the power factor.

In this animated and interactive object, learners examine why the voltage produced by an AC drive must be increased when its frequency is increased due to inductive reactance.

In this animated activity, learners examine why various materials are conductors, insulators, or resistors of current. A short quiz completes the learning object.

In this animated and interactive object, learners follow three steps to calibrate an opposed optical sensor. They consider horizontal alignment, the sensitivity setting, and having an effective beam.

This animated object allows students to examine the four steps used to reduce a complex circuit to a simple series circuit.