Electrical Systems Final
Exam Questions &
Answers
Materials that allow electricity to flow through them easily such as copper are called -
ANSWERSConductors
Materials that don't allow electricity to flow through them easily are called -
ANSWERSInsulators
This is the measurement of electric current or flow of electrtons - ANSWERSAmpere
This is the measurement of electromotive force or potential difference - ANSWERSVolts
This is the measurement of resistance to the flow of electricity - ANSWERSOhm
This is a measurement of energy used per unit of time - ANSWERSWatt
What is the Ohms Law Formula - ANSWERSV = IR
What is electricity? - ANSWERSA type of energy fueled by the transferof electrons from positive
to negative
What is the difference between power and energy? - ANSWERSPower is energy at a specific
time and energy includes a time constraint (Power * time)
, In a series circuit how do you calculate total resistance? - ANSWERSRT = R1 + R2 + R3
In a parallel circuit how do you calculate total resistance? - ANSWERS1/RT = 1/R1 + 1/R2 + 1/R3
What do the acronyms AC & DC stand for and what is the main difference between the two? -
ANSWERSAlternating Current & Direct Current. Electrons flow in one direction in DC and in AC
they flow forward and then backward a little bit.
What is the function of the hot wire? - ANSWERSThe hot wire is the conductor providing volts.
What is the function of the neutral wire? - ANSWERSIt provides return path for the volts
What is one reason that you would use three phase power? - ANSWERSIt costs less to transport,
motors are smaller and cheaper and & three phase has consistent power
What are the two main reasons that we use AC current today? - ANSWERSIt is cheaper and you
can modify voltage
The tighter the coil is on the transformer - ANSWERSthe higher the voltage
A cycle within electricity goes from 0-360 degrees how many cycles in a second is standard in
the United States - ANSWERS60 Hertz
What two principles are key to a transformer - ANSWERSElectromagnetic & Electromagnetic
induction
Motors or computers on AC current systems can create an inductive load which caused a phase
shift between the voltage and the current, because of this what is the result to power supply? -
ANSWERSPower is waster
Exam Questions &
Answers
Materials that allow electricity to flow through them easily such as copper are called -
ANSWERSConductors
Materials that don't allow electricity to flow through them easily are called -
ANSWERSInsulators
This is the measurement of electric current or flow of electrtons - ANSWERSAmpere
This is the measurement of electromotive force or potential difference - ANSWERSVolts
This is the measurement of resistance to the flow of electricity - ANSWERSOhm
This is a measurement of energy used per unit of time - ANSWERSWatt
What is the Ohms Law Formula - ANSWERSV = IR
What is electricity? - ANSWERSA type of energy fueled by the transferof electrons from positive
to negative
What is the difference between power and energy? - ANSWERSPower is energy at a specific
time and energy includes a time constraint (Power * time)
, In a series circuit how do you calculate total resistance? - ANSWERSRT = R1 + R2 + R3
In a parallel circuit how do you calculate total resistance? - ANSWERS1/RT = 1/R1 + 1/R2 + 1/R3
What do the acronyms AC & DC stand for and what is the main difference between the two? -
ANSWERSAlternating Current & Direct Current. Electrons flow in one direction in DC and in AC
they flow forward and then backward a little bit.
What is the function of the hot wire? - ANSWERSThe hot wire is the conductor providing volts.
What is the function of the neutral wire? - ANSWERSIt provides return path for the volts
What is one reason that you would use three phase power? - ANSWERSIt costs less to transport,
motors are smaller and cheaper and & three phase has consistent power
What are the two main reasons that we use AC current today? - ANSWERSIt is cheaper and you
can modify voltage
The tighter the coil is on the transformer - ANSWERSthe higher the voltage
A cycle within electricity goes from 0-360 degrees how many cycles in a second is standard in
the United States - ANSWERS60 Hertz
What two principles are key to a transformer - ANSWERSElectromagnetic & Electromagnetic
induction
Motors or computers on AC current systems can create an inductive load which caused a phase
shift between the voltage and the current, because of this what is the result to power supply? -
ANSWERSPower is waster
