Learners view the operation of an NPN transistor in the active region.
Mechanical Advantage (Screencast)
By James Bourassa, John Rosz
Learners apply lever ratios to calculate the mechanical advantage in basic mechanisms.
Weight-Volume Relationships: Density
By Steve Whitmoyer
Students read an explanation of the use of weight-volume relationships and practice calculating density.
Instantaneous Current Calculations of a De-Energizing RL Circuit (Using a TI-36X Calculator)
By Terry Bartelt
Students view a sample of the keystrokes used on a TI-36X calculator to solve for the instantaneous current of a de-energizing circuit.
The Superposition Theorem
By Patrick Hoppe
The superposition theorem is explained as it relates to dc circuit analysis. Examples are given.
AC Voltage Conversion Problems
By John Rosz, Terry Bartelt
Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.
AC Current Flow
In this interactive and animated object, learners examine the flow of electron current into and out of hot and neutral sockets during each alternation of an AC waveform. A brief quiz completes the activity.
Transport Processes Requiring ATP
By Barbara Liang
In this animated object, students observe how ATP energy is used to move substances across the cell membrane from an area of lower concentration to an area of higher concentration and when something too large needs to get in or out of a cell.
Learners follow the steps for reducing all of the elements of a complex circuit to a single current source and a single source resistance to create a simple circuit. Several examples are given for dc circuits. The conversion between Thevenin and Norton is also presented.
Series-Parallel DC Circuits Analysis
Learners follow a methodical approach for the dc analysis of series-parallel circuits.
Check POLARPEDIA.eu for answers. All the questions are polar and STEM related!
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