EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS)| 100% CORRECT| GRADE A
Carbon film resistors have which characteristic - ANSWER -
Maintain close tolerances in response to temperature changes
_____ have a negative temperature coefficient - ANSWER -
Thermistor
Filament resistance increases when bulb is energized - ANSWER -
Incandescent bulbs
Ease with which magnetic lines of force distribute themselves
throughout material is referred to as? - ANSWER -Permeability
Ability of material to retain it magnetism is called - ANSWER -
Retentivity
Magnetic lines of force form a closed loop is called - ANSWER -
Magnetic Circuit
, What direction do magnetic lines. of force extend outside of the
magnet - ANSWER -North to south
Which device can be used to measure current in a circuit without
disconnecting any wires - ANSWER -clamp on a meter
as current decreases through the loop, the ______ the magnet
becomes - ANSWER -Weaker
How can permanent magnets be damaged - ANSWER -Mechanical
shock
What type of magnet would be used on escalator brake - ANSWER
-ceramic
Fluorescent lamps produce _______ the lumens per watt compared
to incandescent lamps - ANSWER -2x
How are switches rated? - ANSWER -by max current switch can
pass when closed
What happens to voltage in a series circuit - ANSWER -Voltage
drop is directly proportional to resistance