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Learning Object
RL Time Constant
Learners read an explanation of the RL time constant and examine the formula for calculating the instantaneous current value. The current is graphed as it climbs to maximum or drops to zero. Note* In the formulas in this module, the Greek letter epsilon should be the mathematical constant 'e'.
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constant, dc, electronics, inductance, inductor, L/R time constant, tau
RPM of AC Motors
Learners study factors that affect the synchronous speed of an AC motor: the applied AC frequency and the number of stator poles.
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ac motor, motor speed, number of poles, pole pairs, rpm, synchronous speed
Reading the Title Block
In this activity we’ll explain what a title block is and how to read the information it holds.
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Resistor Color Code Description
In this interactive activity, students read about the colored stripes on a resistor and interpret the placement of those colors to determine the value of four-band resistors.
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cc0001, code, color, dc, electronics, resistor
Reversing the Rotation of DC Motors
Learners view animations showing how to change the connections to cause a DC motor to reverse its rotation. A short quiz completes the activity.
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dc, direction, motor, motors, reversing, rotation
Robotic Welding Instructions
The learner will gain an understanding of how a robot uses welding instructions to perform tasks. This learning activity includes video.
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linear motion incorrect weld end, linear motion while welding, linear motion without welding, robot, welding data parameters, welding instruction, welding instructions, welding robot
Rotating Vector Representation of the Sine Function
The learner will be able to represent steady-state AC sinusoidal signals using phasors, which will lead to a simplified technique of analyzing AC circuits in a very similar way that we analyze DC circuits.
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circuit, circuit analysis, phase vector, phasor, sine wave, steady-state
SMAW Discontinuities
In this activity, we'll examine some common discontinuities associated with SMAW welding and review ways to prevent these problems from happening.
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SMAW Electrode Characteristics
In this learning activity, you’ll explore the characteristics of common, carbon steel shielded metal arc welding electrodes, which fall under American Welding Society specification A5.1.
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SMAW Electrodes, welding electrodes, Welding specifications, what's the difference between SMAW electrodes