B-005
Subelement B-005
Section B-005-009
Section B-005-009
If two equal-value inductors are connected in series, what is their total inductance?
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Correct AnswerTwice the value of one inductor
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The value of one inductor times 4
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The value of one inductor divided by 4
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Half the value of one inductor
Key words: SERIES INDUCTORS. Inductors (coils) in combinations obey rules similar to resistors. In SERIES, the total value is the sum of the values. In PARALLEL combination with components of IDENTICAL values, the total value is the value of one component divided by the number in the circuit.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If two equal-value inductors are connected in parallel, what is their total inductance?
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Twice the value of one inductor
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The value of one inductor times 4
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The value of one inductor divided by 4
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Correct AnswerHalf the value of one inductor
Key words: PARALLEL INDUCTORS. Inductors (coils) in combinations obey rules similar to resistors. In PARALLEL combination with components of IDENTICAL values, the total value is the value of one component divided by the number in the circuit. In SERIES, the total value is the sum of the values.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If two equal-value capacitors are connected in series, what is their total capacitance?
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Correct AnswerHalf the value of either capacitor
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The value of one capacitor times 4
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Twice the value of one capacitor
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The value of one capacitor divided by 4
Key words: SERIES CAPACITORS. Capacitors behave OPPOSITE TO INDUCTORS. Capacitors add up in parallel combinations BUT the total value is less than the smallest in a series combination. With identical CAPACITORS in SERIES, the total value is the value of one component divided by the number in the circuit.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If two equal-value capacitors are connected in parallel, what is their total capacitance?
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The value of one capacitor times 4
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Correct AnswerTwice the value of one capacitor
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Half the value of either capacitor
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The value of one capacitor divided by 4
Key words: PARALLEL CAPACITORS. Capacitors behave OPPOSITE TO INDUCTORS. With CAPACITORS in PARALLEL, the total value is the sum of the values. Picture in your head, the area of the plates growing as more and more capacitors are added in parallel. More plate area, more capacity.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
You are constructing an air-core inductor using a coil of wire. What parameters determine its inductance?
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Coil diameter, coil orientation and number of turns of wire
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Type of wire, coil length and number of turns of wire
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Correct AnswerCoil diameter, coil length and number of turns of wire
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Coil diameter, coil length and operating frequency
Inductance in a coil is due to the interaction of the magnetic fields from one turn to the others. The ease of setting up a magnetic field through a suitable core material, the relative position of the turns (diameter and length) and the number of turns all contribute to inductance.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
A capacitor is made of two identical metal plates separated by air. What parameters determine its capacitance?
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Correct AnswerSurface area of the plates and spacing between the plates
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Operating frequency and spacing between the plates
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Type of metal and spacing between the plates
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Surface area of the plates and applied voltage
A simple capacitor is two plates next to one another. The material used as a dielectric to insulate the two plates and the distance between the plates influence the importance of the electric field that can be set up. The area and number of plates multiply the capacitance effect.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
What precaution must you take when using polarized electrolytic capacitors?
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Use them exclusively at radio frequencies
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Correct AnswerNever apply a reverse voltage
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Do not use them in series combinations
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Do not parallel with capacitors other than electrolytics
Key words: POLARIZED CAPACITORS. The construction of polarized capacitors requires that the positive and negative terminals of the capacitor be correctly connected to a source of voltage of the same polarity, otherwise the capacitor may be damaged.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If you wire two 12-millihenry chokes in series, what is the inductance of the combination?
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Correct Answer24 millihenries
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48 millihenries
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3 millihenries
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6 millihenries
Key words: SERIES INDUCTORS. Inductors (coils) in combinations obey rules similar to resistors. In SERIES, the total value is the sum of the values. In PARALLEL with identical values, the total value is the value of one component divided by the number in the circuit.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If you wire two 20-millihenry inductors in parallel, what is the inductance of the combination?
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5 millihenries
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Correct Answer10 millihenries
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80 millihenries
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40 millihenries
Key words: PARALLEL INDUCTORS. Inductors (coils) in combinations obey rules similar to resistors. In SERIES, the total value is the sum of the values. In PARALLEL with identical values, the total value is the value of one component divided by the number in the circuit.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If you wire two 20-microfarad capacitors in series, what is the capacity of the combination?
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80 microfarads
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5 microfarads
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40 microfarads
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Correct Answer10 microfarads
Key words: SERIES CAPACITORS. Capacitors behave OPPOSITE TO INDUCTORS. Capacitors add up in parallel combinations BUT the total value is less than the smallest in a series combination. With identical CAPACITORS in SERIES, the total value is the value of one component divided by the number in the circuit. [ capacitors in series might be useful to augment the overall voltage rating ]
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
If you wire two 24-microfarad capacitors in parallel, what is the capacity of the combination?
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4 microfarads
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12 microfarads
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96 microfarads
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Correct Answer48 microfarads
Key words: SERIES CAPACITORS. Capacitors behave OPPOSITE TO INDUCTORS. Capacitors add up in parallel combinations BUT the total value is less than the smallest in a series combination. With identical CAPACITORS in SERIES, the total value is the value of one component divided by the number in the circuit.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
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