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 and animated activity, students read how a fuse de-energizes a parallel circuit when too many lamps are connected to a power outlet. A brief quiz concludes the activity.
Learners use trigonometry to calculate angular input forces involving Class 2 mechanical levers.
Learners explore the use of complex numbers through a series AC circuit analysis problem. The steps are compared to the graphical method of finding circuit impedance and the phase angle.
The student studies the method to calculate complex power where the Vrms of a circuit is multiplied by the complex conjugate of the total circuit current. Several examples are given, along with the power triangle.
The learner views a method to find the total complex power of a circuit in which the individual real and reactive powers are found and then added together. Several examples are shown, along with the power triangles.
In this animated object, students view an example of how to convert rotational velocity to linear velocity. They then work practice problems.
In this animated and interactive object, learners use rotational input velocity to determine the linear output velocity of a rocker or lever. Learners test their knowledge in an exercise at the end of the activity.
In this animated object, learners identify the basic parts and operation of a crank slider mechanism. They also follow the steps to use rotational input velocity to determine the linear output velocity of a slider component.
In this animated object, learners examine the situation that occurs when any two links of a mechanism lie in the same plane or on a straight line. Crank-sliders and crank-rockers are shown.
Students review the Current Divider Rule (CDR) and work practice problems.
In this interactive object, learners review the CDR and work nine problems. Immediate feedback is given.
Learners examine first and second approximations and view examples of a "stiff" current source.
Students determine what happens to current flow in a series circuit when the resistance is changed. A brief quiz concludes the activity.
Learners answer eight questions about capacitors. Help pages are available.
Learners answer six questions about transformers.
A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.
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.
In this interactive object, learners answer nine questions about series and parallel circuits. Immediate feedback is provided.