What type of resistor operates by moving the wiper arm with a screw of some number of turns?

A) pot
B) wire-wound
C) multiturn variable
D) rheostat

A square wave voltage varies between 0 V and 12 V. The positive pulses are 75 μ s wide and there is a 25 μ s gap between them. What is the DC average of the waveform?

A) 3 V
B) 4 V
C) 6 V
D) 9 V

Before determining the algebraic sum of voltages using Kirchhoff's voltage law, you must first determine which end of the _______________ element is positive and which is negative.

Before adjusting drive-belt tension, Technician A checks for proper pulley alignment.Technician B looks up the specified belt tension in the vehicle's service manual.Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

What is the maximum number of valence electrons in an atom?​

A) ​four
B) ​six
C) ​eight
D) ​twelve