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NM ES-3 EXAM COMPLETE
QUESTIONS AND CORRECT
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DETAILED ANSWERS (VERIFIED
ANSWERS) A+ GRADED
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, Wiring System
Is a form of electrical circuit.
Electrical circuit
It consists of an energy source, energy transfer medium and a load.
Energy Transfer Medium
copper wire, fiber optic cables and air in the case of radiated energy
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Load
receives the transferred energy such as resistors, lights, speakers, motors, etc.
EMF (electromotive force)
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The force that moves electrical energy.
Current or Current Flow
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The movement of electrons through a circuit that is caused by the electromotive force or voltage
applied to the circuit.
Inductance (L)
Unit is the henry. It is the property of a circuit that causes an opposition to any change of current
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within the circuit. As electrons flow, a magnetic field is produced. The magnetic force induces a
change in voltage.
Grounding
assures transmission of electrical signals without interference from electromagnetic radiation
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from other transmission lines and equipment. This interference, called crosstalk, can happen
from adjacent lines, motors, PCs, lights and other devices.
Grounding electrode
Connection to the electrode should be less than 1 ft below the surface of the solid and the
electrode should extend at least 10 ft below ground.
Ground Loop
NM ES-3 EXAM COMPLETE
QUESTIONS AND CORRECT
lo
DETAILED ANSWERS (VERIFIED
ANSWERS) A+ GRADED
yc
ud
St
, Wiring System
Is a form of electrical circuit.
Electrical circuit
It consists of an energy source, energy transfer medium and a load.
Energy Transfer Medium
copper wire, fiber optic cables and air in the case of radiated energy
ck
Load
receives the transferred energy such as resistors, lights, speakers, motors, etc.
EMF (electromotive force)
lo
The force that moves electrical energy.
Current or Current Flow
yc
The movement of electrons through a circuit that is caused by the electromotive force or voltage
applied to the circuit.
Inductance (L)
Unit is the henry. It is the property of a circuit that causes an opposition to any change of current
ud
within the circuit. As electrons flow, a magnetic field is produced. The magnetic force induces a
change in voltage.
Grounding
assures transmission of electrical signals without interference from electromagnetic radiation
St
from other transmission lines and equipment. This interference, called crosstalk, can happen
from adjacent lines, motors, PCs, lights and other devices.
Grounding electrode
Connection to the electrode should be less than 1 ft below the surface of the solid and the
electrode should extend at least 10 ft below ground.
Ground Loop
