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Exam (elaborations)

second semester IEC Questions and Answers 100% Solved

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  • Course
  • IEC
  • Institution
  • IEC

Exam of 8 pages for the course IEC at IEC (second semester IEC)

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  • October 16, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • IEC
  • IEC
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second semester IEC

The term gigahertz means ___ per second. - answer billion cycles

when current flows in a conductor. - answer both a and b

A charged body is surrounded by - answera magnetic field

To an electrician the drawing at the right represents - answera sine wave

Where operating in the United States, AC voltage reaches a positive peak ___ times
during 1 second - answer60

current constantly changes direction of flow and magnitude as it completes the circuit
from a power source to a load and then back to the power source. - answerAC

The horizontal axis on a voltage sine wave, generated from an AC generator,
represents - answertime

Each phase of three-phase AC power is offset by ___ degrees. - answer120

An AC generator produces ___ cycle(s) per revolution for each pair of poles. -
answerone

The peak-to-peak value of a sine wave is ___ the maximum positive peak value. -
answertwice

RMS is an abbreviation for - answerRoot Mean Square

Which of the conversion formulas listed below is correct? - answerRMS = Peak × 0.707

Which of the symbols, shown below, is used to represent an AC power source in a
schematic circuit? - answercircle with a line in the middle

When two like-charged bodies are brought together, their magnetic fields will work to
___ them. - answerrepel

loss is loss caused by the resistance of the copper wire to the flow of current. -
answerCopper

A change in the magnetic field surrounding the conductor induces a voltage in the
conductor. This induced voltage is known as - answerCounter EMF

, is the property of an electrical circuit that opposes any change in current. -
answerInductance

Inductance is represented by the letter - answerL

Inductance is measured in - answerHenrys

Inductors in parallel add like resistors in - answerparallel

Which of the formulas, shown below, is correct to find the equivalent of 3 inductors in a
series circuit? - answerLt = L1 + L2 + L3

is the measure of a circuit's ability to store an electrical charge. - answerCapacitance

A capacitor is made up of a pair of conductive plates separated by a thin layer of ___
material. - answerinsulating

The unit of measure for capacitance is - answerFarads

Which of the symbols, shown below, is used to represent a capacitor in a schematic
circuit? - answer-{ }-

Capacitors in series add like resistors in - answerparallel

Inductors in series add like resistors in - answerseries

Capacitors in parallel add like resistors in - answerseries

As current flow through a conductor increases, the magnetic field strength -
answerincreases

Current flow through a conductor creates a magnetic field around the conductor. -
answerTrue

A change in the magnetic field surrounding the conductor induces a voltage in the
conductor. This induced voltage is known as ___. - answerCounter EMF

A ___ is a device that converts electrical energy into a linear force. - answersolenoid

A ___ is a device that attracts iron and steel because of the molecular alignment of its
material. - answermagnet

Permanent magnets are used in the construction of ___ motors. - answerDC

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