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FCC Element 3 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass
3-1A1 The product of the readings of an AC voltmeter and AC ammeter is called: -
Answer✔Apparent power.
3-1A2 What is the basic unit of electrical power? - Answer✔Watt.
3-1A3 What is the term used to express the amount of electrical energy stored in an
electrostatic field? - Answer✔Joules.
3-1A4 What device is used to store electrical energy in an electrostatic field? - Answer✔.
Capacitor.
3-1A5 What formula would determine the inductive reactance of a coil if frequency and coil
inductance are known? - Answer✔XL = 2f L
3-1A6 What is the term for the out-of-phase power associated with inductors and capacitors? -
Answer✔Reactive power.
3-2A1 What determines the strength of the magnetic field around a conductor? - Answer✔The
amount of current.
3-2A2 What will produce a magnetic field? - Answer✔A current flowing through a conductor.
1
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 12:36 PM A+
3-2A3 When induced currents produce expanding magnetic fields around conductors in a
direction that opposes the original magnetic field, this is known as: - Answer✔Lenz's law.
3-2A4 The opposition to the creation of magnetic lines of force in a magnetic circuit is known
as: - Answer✔Reluctance.
3-2A5 What is meant by the term "back EMF"? - Answer✔A voltage that opposes the applied
EMF.
3-2A6 Permeability is defined as: - Answer✔The ratio of magnetic flux density in a substance to
the magnetizing force that produces it.
3-3A1 What metal is usually employed as a sacrificial anode for corrosion control purposes? -
Answer✔Zinc bar.
3-3A2 What is the relative dielectric constant for air? - Answer✔1
3-3A3 Which metal object may be least affected by galvanic corrosion when submerged in
seawater? - Answer✔Stainless steel propeller shaft.
3-3A4 Skin effect is the phenomenon where: - Answer✔RF current flows in a thin layer of the
conductor, closer to the surface, as frequency increases.
3-3A5 Corrosion resulting from electric current flow between dissimilar metals is called: -
Answer✔Galvanic corrosion.
3-3A6 Which of these will be most useful for insulation at UHF frequencies? - Answer✔Mica.
2
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3-4A1 What formula would calculate the total inductance of inductors in series? - Answer✔LT =
L1 + L2
3-4A2 Good conductors with minimum resistance have what type of electrons? -
Answer✔Many free electrons.
3-4A3 Which of the 4 groups of metals listed below are the best low-resistance conductors? -
Answer✔Gold, silver, and copper.
3-4A4 What is the purpose of a bypass capacitor? - Answer✔It removes alternating current by
providing a low impedance path to ground.
3-4A5 How would you calculate the total capacitance of three capacitors in parallel? -
Answer✔CT = C1 + C2 + C3.
3-4A6 How might you reduce the inductance of an antenna coil? - Answer✔Reduce the number
of turns.
3-5A1 What are the two most commonly-used specifications for a junction diode? -
Answer✔Maximum forward current and PIV (peak inverse voltage).
3-5A2 What limits the maximum forward current in a junction diode? - Answer✔The junction
temperature.
3-5A3 MOSFETs are manufactured with THIS protective device built into their gate to protect
the device from - Answer✔Zener diode.
3-5A4 What are the two basic types of junction field-effect transistors? - Answer✔N-channel
and P-channel.
3
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 12:36 PM A+
3-5A5 A common emitter amplifier has: - Answer✔. More voltage gain than a common
collector.
3-5A6 How does the input impedance of a field-effect transistor compare with that of a bipolar
transistor? - Answer✔An FET has high input impedance; a bipolar transistor has low input
impedance.
3-6A1 An AC ammeter indicates: - Answer✔. Effective (RMS) values of current.
3-6A2 By what factor must the voltage of an AC circuit, as indicated on the scale of an AC
voltmeter, be multiplied to obtain the peak voltage value? - Answer✔. 1.414
3-6A3 What is the RMS voltage at a common household electrical power outlet? -
Answer✔117-V AC.
3-6A4 What is the easiest voltage amplitude to measure by viewing a pure sine wave signal on
an oscilloscope? - Answer✔. Peak-to-peak.
3-6A5 By what factor must the voltage measured in an AC circuit, as indicated on the scale of an
AC voltmeter, be multiplied to obtain the average voltage value? - Answer✔. 0.9
3-6A6 What is the peak voltage at a common household electrical outlet? - Answer✔. 165.5
volts.
3-7A1 What is a sine wave? - Answer✔. A wave whose amplitude at any given instant can be
represented by the projection of a point on a wheel rotating at a uniform speed.
3-7A2 How many degrees are there in one complete sine wave cycle? - Answer✔. 360 degrees.
4
FCC Element 3 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass
3-1A1 The product of the readings of an AC voltmeter and AC ammeter is called: -
Answer✔Apparent power.
3-1A2 What is the basic unit of electrical power? - Answer✔Watt.
3-1A3 What is the term used to express the amount of electrical energy stored in an
electrostatic field? - Answer✔Joules.
3-1A4 What device is used to store electrical energy in an electrostatic field? - Answer✔.
Capacitor.
3-1A5 What formula would determine the inductive reactance of a coil if frequency and coil
inductance are known? - Answer✔XL = 2f L
3-1A6 What is the term for the out-of-phase power associated with inductors and capacitors? -
Answer✔Reactive power.
3-2A1 What determines the strength of the magnetic field around a conductor? - Answer✔The
amount of current.
3-2A2 What will produce a magnetic field? - Answer✔A current flowing through a conductor.
1
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 12:36 PM A+
3-2A3 When induced currents produce expanding magnetic fields around conductors in a
direction that opposes the original magnetic field, this is known as: - Answer✔Lenz's law.
3-2A4 The opposition to the creation of magnetic lines of force in a magnetic circuit is known
as: - Answer✔Reluctance.
3-2A5 What is meant by the term "back EMF"? - Answer✔A voltage that opposes the applied
EMF.
3-2A6 Permeability is defined as: - Answer✔The ratio of magnetic flux density in a substance to
the magnetizing force that produces it.
3-3A1 What metal is usually employed as a sacrificial anode for corrosion control purposes? -
Answer✔Zinc bar.
3-3A2 What is the relative dielectric constant for air? - Answer✔1
3-3A3 Which metal object may be least affected by galvanic corrosion when submerged in
seawater? - Answer✔Stainless steel propeller shaft.
3-3A4 Skin effect is the phenomenon where: - Answer✔RF current flows in a thin layer of the
conductor, closer to the surface, as frequency increases.
3-3A5 Corrosion resulting from electric current flow between dissimilar metals is called: -
Answer✔Galvanic corrosion.
3-3A6 Which of these will be most useful for insulation at UHF frequencies? - Answer✔Mica.
2
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 12:36 PM A+
3-4A1 What formula would calculate the total inductance of inductors in series? - Answer✔LT =
L1 + L2
3-4A2 Good conductors with minimum resistance have what type of electrons? -
Answer✔Many free electrons.
3-4A3 Which of the 4 groups of metals listed below are the best low-resistance conductors? -
Answer✔Gold, silver, and copper.
3-4A4 What is the purpose of a bypass capacitor? - Answer✔It removes alternating current by
providing a low impedance path to ground.
3-4A5 How would you calculate the total capacitance of three capacitors in parallel? -
Answer✔CT = C1 + C2 + C3.
3-4A6 How might you reduce the inductance of an antenna coil? - Answer✔Reduce the number
of turns.
3-5A1 What are the two most commonly-used specifications for a junction diode? -
Answer✔Maximum forward current and PIV (peak inverse voltage).
3-5A2 What limits the maximum forward current in a junction diode? - Answer✔The junction
temperature.
3-5A3 MOSFETs are manufactured with THIS protective device built into their gate to protect
the device from - Answer✔Zener diode.
3-5A4 What are the two basic types of junction field-effect transistors? - Answer✔N-channel
and P-channel.
3
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 12:36 PM A+
3-5A5 A common emitter amplifier has: - Answer✔. More voltage gain than a common
collector.
3-5A6 How does the input impedance of a field-effect transistor compare with that of a bipolar
transistor? - Answer✔An FET has high input impedance; a bipolar transistor has low input
impedance.
3-6A1 An AC ammeter indicates: - Answer✔. Effective (RMS) values of current.
3-6A2 By what factor must the voltage of an AC circuit, as indicated on the scale of an AC
voltmeter, be multiplied to obtain the peak voltage value? - Answer✔. 1.414
3-6A3 What is the RMS voltage at a common household electrical power outlet? -
Answer✔117-V AC.
3-6A4 What is the easiest voltage amplitude to measure by viewing a pure sine wave signal on
an oscilloscope? - Answer✔. Peak-to-peak.
3-6A5 By what factor must the voltage measured in an AC circuit, as indicated on the scale of an
AC voltmeter, be multiplied to obtain the average voltage value? - Answer✔. 0.9
3-6A6 What is the peak voltage at a common household electrical outlet? - Answer✔. 165.5
volts.
3-7A1 What is a sine wave? - Answer✔. A wave whose amplitude at any given instant can be
represented by the projection of a point on a wheel rotating at a uniform speed.
3-7A2 How many degrees are there in one complete sine wave cycle? - Answer✔. 360 degrees.
4
