By Terry Bartelt
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In this animated activity, students read about the two general types of variable resistors: potentiometers and rheostats. They then answer six multiple-choice questions.
In this animated activity, learners examine the operation of hydraulic directional control valves and the internal components that divert the fluid.
Learners view an animation showing the operation of a Vortex flowmeter that is used to measure flow in a process control system.