The learner will understand the operation of motor control circuits used to start and stop three-phase motors.
Series-Parallel Circuit Analysis Practice Problems: Circuit 10
By Patrick Hoppe
Learners examine a series-parallel circuit and solve 14 problems related to voltage, current, and power. A help screen is provided.
Internal Elements of a 555 Timer (Screencast)
By Terry Bartelt
In this screencast, learners examine the internal elements of a 555 IC and their operation.
DC/AC: Unit 1 Sample Exam
In this interactive object, learners work 11 problems covering atomic structure, conductors, and insulators.
Kirchhoff's Voltage Law
Students read a definition of Kirchhoff's Voltage Law and view examples of its use.
An Impedance Matching Application
Learners consider why an impedance matching transformer is needed to connect an antenna to a television.
The Reflected Load in a Transformer
Learners examine how the load resistance connected to the secondary coil of a transformer affects the primary current. A brief quiz completes the activity.
Learners examine the impedance matching capability of a transformer and how to select the proper turns ratio to achieve this function. A brief quiz completes the activity.
Transformer Action Demonstration
Learners view animations and video clips showing how power is transmitted from one energized coil to another.
Students read descriptions of the voltage, current, and turns ratios of the primary and secondary coils for a transformer in this interactive lesson.
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