Online study for the FCC commercial radio license exams. Study materials for the MROP, GROL, and RADAR exams

Element 3: General Radiotelephone

effective 6/25/2009

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3-A-004: Resistance, Capacitance & Inductance

3-4A1: What formula would calculate the total inductance of inductors in series?

LT = L1 + L2

LT = L1 / L2

LT = 1 / L1 + L2

LT = 1 / L1 × L2

3-4A2: Good conductors with minimum resistance have what type of electrons?

Many free electrons.

Few free electrons.

No electrons.

Some free electrons.

3-4A3: Which of the 4 groups of metals listed below are the best low-resistance conductors?

Gold, silver, and copper.

Stainless steel, bronze, and lead.

Iron, lead, and nickel.

Bronze, zinc, and manganese.

3-4A4: What is the purpose of a bypass capacitor?

It removes alternating current by providing a low impedance path to ground.

It increases the resonant frequency of the circuit.

It removes direct current from the circuit by shunting DC to ground.

It forms part of an impedance transforming circuit.

3-4A5: How would you calculate the total capacitance of three capacitors in parallel?

CT = C1 + C2 + C3.

CT = C1 + C2 / C1 - C2 + C3.

CT = C1 + C2 / C1 × C2 + C3.

CT = 1 / C1 + 1 / C2 + 1 / C3.

3-4A6: How might you reduce the inductance of an antenna coil?

Reduce the number of turns.

Add additional turns.

Add more core permeability.

Compress the coil turns.

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3-A-003: Materials
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Element 3: General Radiotelephone
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3-A-005: Semi-conductors
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