G5C: Resistors, capacitors, and inductors in series and parallel; transformers
G5C01:
What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?
Mutual inductance
Capacitive coupling
Displacement current coupling
Mutual capacitance
G5C02:
Where is the source of energy normally connected in a transformer?
To the primary winding
To the secondary winding
To the core
To the plates
G5C03:
What is current in the primary winding of a transformer called if no load is attached to the secondary?
Magnetizing current
Direct current
Excitation current
Stabilizing current
G5C04:
What is the total resistance of three 100-ohm resistors in parallel?
33.3 ohms
.30 ohms
.33 ohms
300 ohms
G5C05:
What is the value of each resistor if three equal value resistors in parallel produce 50 ohms of resistance, and the same three resistors in series produce 450 ohms?
150 ohms
1500 ohms
90 ohms
175 ohms
G5C06:
What is the voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?
26.7 volts
2370 volts
540 volts
5.9 volts
G5C07:
What is the turns ratio of a transformer used to match an audio amplifier having a 600-ohm output impedance to a speaker having a 4-ohm impedance?
12.2 to 1
24.4 to 1
150 to 1
300 to 1
G5C08:
What is the equivalent capacitance of two 5000 picofarad capacitors and one 750 picofarad capacitor connected in parallel?
10750 picofarads
576.9 picofarads
1733 picofarads
3583 picofarads
G5C09:
What is the capacitance of three 100 microfarad capacitors connected in series?
33.3 microfarads
.30 microfarads
.33 microfarads
300 microfarads
G5C10:
What is the inductance of three 10 millihenry inductors connected in parallel?
3.3 millihenrys
.30 Henrys
3.3 Henrys
30 millihenrys
G5C11:
What is the inductance of a 20 millihenry inductor in series with a 50 millihenry inductor?
70 millihenrys
.07 millihenrys
14.3 millihenrys
1000 millihenrys
G5C12:
What is the capacitance of a 20 microfarad capacitor in series with a 50 microfarad capacitor?
14.3 microfarads
.07 microfarads
70 microfarads
1000 microfarads
G5C13:
What component should be added to a capacitor in a circuit to increase the circuit capacitance?
A capacitor in parallel
An inductor in series
A resistor in series
A capacitor in series
G5C14:
What component should be added to an inductor in a circuit to increase the circuit inductance?
An inductor in series
A capacitor in series
A resistor in parallel
An inductor in parallel
G5C15:
What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor in parallel?
5.9 ohms
0.17 ohms
10000 ohms
80 ohms
G5C16:
What component should be added to an existing resistor in a circuit to increase circuit resistance?
A resistor in series
A resistor in parallel
A capacitor in series
A capacitor in parallel
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