ASVAB Electronics Information (EI) Real
practice Exam With Actual
Questions,Rationales And Verified
Answers/Expert Verified For Guaranteed
Pass 2025/2026/Latest Update/Instant
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1. What is the unit of electrical resistance?
A. Ampere
B. Volt
C. Ohm
D. Watt
Rationale: Resistance measures how much a material opposes current flow. Its unit is the
ohm (Ω).
2. Ohm’s Law states that:
A. Voltage = Current × Resistance
B. Power = Voltage × Current
C. Voltage = Current × Resistance
D. Current = Power × Voltage
Rationale: Ohm’s Law defines the relationship between voltage, current, and resistance: V = I
× R.
3. Which of the following components stores energy in an electric field?
A. Inductor
B. Capacitor
C. Resistor
D. Diode
Rationale: A capacitor stores energy in an electric field, while an inductor stores energy in a
magnetic field.
,4. The unit of capacitance is:
A. Henry
B. Ohm
C. Farad
D. Tesla
Rationale: Capacitance is measured in farads (F), representing the ability to store charge per
volt.
5. Which device allows current to flow in only one direction?
A. Resistor
B. Capacitor
C. Diode
D. Transformer
Rationale: A diode conducts current in one direction and blocks it in the opposite.
6. The primary function of a transformer is to:
A. Store energy
B. Change voltage levels
C. Convert AC to DC
D. Limit current
Rationale: Transformers increase or decrease AC voltage through electromagnetic induction.
7. What is the symbol for a ground connection in a circuit diagram?
A. Zigzag line
B. Three horizontal lines decreasing in length
C. Circle with a line
D. Triangle
Rationale: A ground is represented by three horizontal lines of decreasing length.
8. The term “AC” stands for:
A. Alternating Charge
B. Ampere Current
C. Alternating Current
D. Applied Circuit
, Rationale: AC is alternating current, where the flow of electrons reverses direction
periodically.
9. Which component opposes changes in current?
A. Capacitor
B. Inductor
C. Resistor
D. Transistor
Rationale: Inductors resist changes in current by inducing an opposing voltage.
10. Which of the following is an example of a semiconductor?
A. Copper
B. Silicon
C. Aluminum
D. Iron
Rationale: Silicon is a semiconductor, allowing controlled conduction under certain
conditions.
11. The unit of inductance is:
A. Farad
B. Ohm
C. Henry
D. Tesla
Rationale: Inductance is measured in henrys (H), representing the ratio of induced voltage to
the rate of change of current.
12. A short circuit occurs when:
A. Current is too low
B. Voltage is too high
C. A low-resistance path bypasses the load
D. Resistance is too high
Rationale: A short circuit allows excessive current to flow by bypassing the intended path,
which can cause damage.
practice Exam With Actual
Questions,Rationales And Verified
Answers/Expert Verified For Guaranteed
Pass 2025/2026/Latest Update/Instant
Download Pdf
1. What is the unit of electrical resistance?
A. Ampere
B. Volt
C. Ohm
D. Watt
Rationale: Resistance measures how much a material opposes current flow. Its unit is the
ohm (Ω).
2. Ohm’s Law states that:
A. Voltage = Current × Resistance
B. Power = Voltage × Current
C. Voltage = Current × Resistance
D. Current = Power × Voltage
Rationale: Ohm’s Law defines the relationship between voltage, current, and resistance: V = I
× R.
3. Which of the following components stores energy in an electric field?
A. Inductor
B. Capacitor
C. Resistor
D. Diode
Rationale: A capacitor stores energy in an electric field, while an inductor stores energy in a
magnetic field.
,4. The unit of capacitance is:
A. Henry
B. Ohm
C. Farad
D. Tesla
Rationale: Capacitance is measured in farads (F), representing the ability to store charge per
volt.
5. Which device allows current to flow in only one direction?
A. Resistor
B. Capacitor
C. Diode
D. Transformer
Rationale: A diode conducts current in one direction and blocks it in the opposite.
6. The primary function of a transformer is to:
A. Store energy
B. Change voltage levels
C. Convert AC to DC
D. Limit current
Rationale: Transformers increase or decrease AC voltage through electromagnetic induction.
7. What is the symbol for a ground connection in a circuit diagram?
A. Zigzag line
B. Three horizontal lines decreasing in length
C. Circle with a line
D. Triangle
Rationale: A ground is represented by three horizontal lines of decreasing length.
8. The term “AC” stands for:
A. Alternating Charge
B. Ampere Current
C. Alternating Current
D. Applied Circuit
, Rationale: AC is alternating current, where the flow of electrons reverses direction
periodically.
9. Which component opposes changes in current?
A. Capacitor
B. Inductor
C. Resistor
D. Transistor
Rationale: Inductors resist changes in current by inducing an opposing voltage.
10. Which of the following is an example of a semiconductor?
A. Copper
B. Silicon
C. Aluminum
D. Iron
Rationale: Silicon is a semiconductor, allowing controlled conduction under certain
conditions.
11. The unit of inductance is:
A. Farad
B. Ohm
C. Henry
D. Tesla
Rationale: Inductance is measured in henrys (H), representing the ratio of induced voltage to
the rate of change of current.
12. A short circuit occurs when:
A. Current is too low
B. Voltage is too high
C. A low-resistance path bypasses the load
D. Resistance is too high
Rationale: A short circuit allows excessive current to flow by bypassing the intended path,
which can cause damage.
