Learners view the operation of an NPN transistor in the active region.
Transistor DC Analysis Practice Problems: Circuit #3
By Patrick Hoppe
Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.
Testing a Hydraulic Pump
By Terry Bartelt, Stephen Schneider
Learners follow an animated test procedure to determine if the parts of a hydraulic pump are worn.
Clock Pulse Triggering of Flip-Flops
By Terry Bartelt
This learning object shows the symbols used to represent the type of pulse required at the clock input to activate flip-flops.
High-Low Speed Drive Adjustments
Learners examine the circuitry in a DC variable speed drive that prevents the motor from running at 0 rpm or at maximum speed under certain conditions.
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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