Light emitting diodes (LEDs) generally require a forward voltage of 1.7 to ____ volts.
a. 2
b. 2.3
c. 2.5
d. 2.7
a. 2
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In considering economics, the most meaningful comparison between different plastics is cost per ___. ?
A. ?cubic centimeter B. ?kilogram C. ?item D. ?pound
What is roaming?
A. Communicating without actually making a dialed call B. Jumping from cell tower to cell tower C. The act of traveling and communicating between adjacent cells D. Transmitting and receiving from multiple towers at one time
When connecting a four-way switch, the first step is to ____.
a. connect the travelers b. connect the neutral conductor to the light c. connect the ungrounded, or hot, conductor to the common terminal of one three-way switch d. connect the other side of the light to the common terminal of the second three-way switch
To prevent a system from operating with a low charge, a _________________________ is commonly used.
Fill in the blank(s) with the appropriate word(s).