The power switch (transistor) in a switching power supply is turned off and on by
A) a compartor with feedback B) a variable pulse-width oscillator
C) an error detection circuit D) an RC charge/discharge circuit
B
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According to a light bulb manufacturer, its 75 W CFL floodlight consumes 25 W and produces 1500 lumens. What is the efficacy of the floodlight?
What will be an ideal response?
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A tractor jackknife is usually caused by all of the following EXCEPT:
A. overacceleration B. wheel lockup C. trailer override D. excessive cornering
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________ is credited with having the first nursery in North America.
A) John Bartram B) David Landreth C) Bernard McMahon D) William Prince
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A boar identifies an estrous sow by her:
a. scent c. higher-pitched squeal b. appearance d. lower-pitched squeal
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