Subelement A
Principles
Section 4
Resistance, Capacitance & Inductance
What formula would calculate the total inductance of inductors in series?
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LT = L1 / L2
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Correct AnswerLT = L1 + L2
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LT = 1 / L1 + L2
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LT = 1 / L1 x L2
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Good conductors with minimum resistance have what type of electrons?
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Few free electrons.
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No electrons.
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Some free electrons.
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Correct AnswerMany free electrons.
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Which of the 4 groups of metals listed below are the best low-resistance conductors?
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Correct AnswerGold, silver, and copper.
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Stainless steel, bronze, and lead.
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Iron, lead, and nickel.
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Bronze, zinc, and manganese.
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What is the purpose of a bypass capacitor?
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It increases the resonant frequency of the circuit.
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It removes direct current from the circuit by shunting DC to ground.
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Correct AnswerIt removes alternating current by providing a low impedance path to ground.
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It forms part of an impedance transforming circuit.
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How would you calculate the total capacitance of three capacitors in parallel?
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CT = C1 + C2 / C1 - C2 + C3.
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Correct AnswerCT = C1 + C2 + C3.
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CT = C1 + C2 / C1 x C2 + C3.
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CT = 1 / C1+1 / C2 + 1 / C3.
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How might you reduce the inductance of an antenna coil?
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Add additional turns.
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Add more core permeability.
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Correct AnswerReduce the number of turns.
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Compress the coil turns.
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