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A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.
Statics - Trig: Law of Cosines
By Steve Whitmoyer
In this interactive object, learners use the Law of Cosines to calculate forces.
Kirchhoff's Voltage Law
By Patrick Hoppe
Students read a definition of Kirchhoff's Voltage Law and view examples of its use.
By Terry Bartelt
In this animated object, learners examine the operation of a Schmitt Trigger IC and its hysteresis function. A brief quiz completes the activity.
Introduction to Class 2 Levers
By James Bourassa, John Rosz
In this interactive object, students view an animated depiction of Class 2 levers. A matching quiz completes the activity.
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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