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Electrical Systems Exam Question Correctly Answered.
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Electrical Systems Exam Question Correctly Answered. Materials that allow electricity to flow through them easily such as copper are called - CORRECT ANSWER Conductors Materials that don't allow electricity to flow through them easily are called - CORRECT ANSWER Insulators This is the me...

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  • December 12, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • electrical systems exam question correctly answere

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Electrical Systems Exam Question
Correctly Answered.
Materials that allow electricity to flow through them easily such as copper are called - CORRECT
ANSWER Conductors



Materials that don't allow electricity to flow through them easily are called - CORRECT ANSWER
Insulators



This is the measurement of electric current or flow of electrtons - CORRECT ANSWER Ampere



This is the measurement of electromotive force or potential difference - CORRECT ANSWER Volts



This is the measurement of resistance to the flow of electricity - CORRECT ANSWER Ohm



This is a measurement of energy used per unit of time - CORRECT ANSWER Watt



What is the Ohms Law Formula - CORRECT ANSWER V = IR



What is electricity? - CORRECT ANSWER A type of energy fueled by the transferof electrons from
positive to negative



What is the difference between power and energy? - CORRECT ANSWER Power is energy at a specific
time and energy includes a time constraint (Power * time)



In a series circuit how do you calculate total resistance? - CORRECT ANSWER RT = R1 + R2 + R3



In a parallel circuit how do you calculate total resistance? - CORRECT ANSWER 1/RT = 1/R1 + 1/R2 +
1/R3

, What do the acronyms AC & DC stand for and what is the main difference between the two? - CORRECT
ANSWER Alternating 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? - CORRECT ANSWER The hot wire is the conductor providing volts.



What is the function of the neutral wire? - CORRECT ANSWER It provides return path for the volts



What is one reason that you would use three phase power? - CORRECT ANSWER It 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? - CORRECT ANSWER It is cheaper and
you can modify voltage



The tighter the coil is on the transformer - CORRECT ANSWER the higher the voltage



A cycle within electricity goes from 0-360 degrees how many cycles in a second is standard in the United
States - CORRECT ANSWER 60 Hertz



What two principles are key to a transformer - CORRECT ANSWER Electromagnetic & 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? - CORRECT
ANSWER Power is waster



What is apparent power? - CORRECT ANSWER Power available to use



What is reactive power? - CORRECT ANSWER Garbage power, no work done



What is a real power? - CORRECT ANSWER The power that actually does work

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