What happens when a metal blade is positioned in a Hall Effect switch?
What will be an ideal response?
The switch provides a voltage signal and current flows.
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Describe the color and finish of agricultural terra-cotta.
What will be an ideal response?
Steel comes from processing iron ore
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A dc, separately excited motor drives a conveyor belt (constant torque). The terminal voltage of the motor is 120 V. When the conveyor belt is fully loaded, the armature current of the motor is 15 A and the speed of the motor is 180 rpm. The armature resistance of the motor is 2 ?.
a. Calculate the steady-state speed of the motor if the field voltage is reversed. b. Calculate the motor speed if after the field voltage is reversed, the field voltage is reduced by 10%. c. Sketch the speed-torque characteristics and show all operating points. Hint: Assume that the field MMF is linearly proportional to the field voltage.
A soil surveyor with knowledge of landscape/soil relationships can map the soils in a 100 ha watershed making far fewer auger holes than would be need for the same task by another soil surveyor who is not familiar with these relationships
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