The student reviews primary and secondary groups and takes a short quiz.
In this animated object, students examine the shades that result from mixing primary and secondary colors. Color tone and level are also defined.
Students read descriptions of the voltage, current, and turns ratios of the primary and secondary coils for a transformer in this interactive lesson.
Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.
In this interactive object, learners examine geometric characteristic symbols, tolerances, datum feature symbols, and other control frame information. A brief quiz completes the activity.
Learners follow a step-by-step explanation of how to test fuses and circuit interrupting devices.
In this learning activity you'll explore the differences between primary and secondary research.
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 are introduced to primary and secondary batteries. Examples are given.
In this animated activity, learners see that changing the resistance value of the load in the secondary of a transformer causes current to vary in the primary.
Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.
In this interactive object, learners identify a variety of prevention activities as primary, secondary, or tertiary.