Learners view the operation of an NPN transistor in the active region.
Capacitors: What's Inside?
By Patrick Hoppe
Learners examine the properties that determine capacitance.
Parts Make an Assembly
By Glenn Sokolowski
Learners examine the relationship of individual parts in an assembly drawing. Assembly drawing notes, fabricated and purchased parts, and sectional views are explained briefly.
The Transistor Symbol
By Terry Bartelt
In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.
Series-Parallel Circuit Analysis Practice Problems: Circuit 9
Learners examine a series-parallel circuit and solve 14 problems related to voltage, current and power. A help screen is provided.
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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