ASVAB Electronics Information Test 5 — Questions and Answers
Question 1: Which component stores energy in a magnetic field?
- Capacitor
- Resistor
- Inductor (Correct answer)
- Diode
Correct answer: Inductor
Inductors store energy in a magnetic field created by current flowing through a coil of wire.
Question 2: What does a multimeter measure?
- Only voltage
- Only current
- Only resistance
- Voltage, current, and resistance (Correct answer)
Correct answer: Voltage, current, and resistance
A multimeter is a versatile instrument that can measure voltage (V), current (A), and resistance (Ω).
Question 3: What is the total voltage in a series circuit containing a 3V, 5V, and 7V source all aiding?
- 7 volts
- 5 volts
- 15 volts (Correct answer)
- 8 volts
Correct answer: 15 volts
In a series aiding configuration, voltages add together: 3 + 5 + 7 = 15 volts.
Question 4: What is the purpose of a ground in an electrical circuit?
- Supply power to the circuit
- Provide a common reference point and safety path (Correct answer)
- Amplify current signals
- Increase circuit resistance
Correct answer: Provide a common reference point and safety path
Ground provides a common voltage reference (0V) and a safe return path for fault currents.
Question 5: Which waveform is produced by a standard AC generator?
- Square wave
- Sawtooth wave
- Sine wave (Correct answer)
- Triangular wave
Correct answer: Sine wave
AC generators (alternators) naturally produce a smooth sinusoidal (sine wave) voltage output.
Question 6: What is the difference between a NPN and PNP transistor?
- NPN is for AC circuits; PNP is for DC circuits
- NPN has current flowing into the base to turn on; PNP uses current flowing out of the base (Correct answer)
- NPN amplifies voltage; PNP amplifies current
- There is no functional difference
Correct answer: NPN has current flowing into the base to turn on; PNP uses current flowing out of the base
In NPN transistors, base current flows in to switch on; in PNP, current flows out of the base to activate.
Question 7: What effect does increasing wire length have on its electrical resistance?
- Decreases resistance
- Has no effect on resistance
- Increases resistance (Correct answer)
- Only affects inductance, not resistance
Correct answer: Increases resistance
Resistance is directly proportional to wire length: R = ρL/A, so longer wire means higher resistance.
ASVAB Electronics Information Test 5
Which component stores energy in a magnetic field?