Electronics Information Test Flashcards
6 cards from real ASVAB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electronics Information Test flashcards as text
In a series circuit with three resistors of 10Ω, 20Ω, and 30Ω connected to a 12V battery, what is the total current flowing through the circuit?
Answer: 0.2 A
Total resistance in series = 10 + 20 + 30 = 60Ω. Using Ohm's Law: I = V/R = 12/60 = 0.2 amperes.
What is the function of a capacitor in an electronic circuit?
Answer: Store electrical charge and release it when needed
A capacitor stores electrical energy in an electric field between two conductive plates separated by an insulating material (dielectric), releasing the stored energy when needed by the circuit.
What does 'impedance' mean in an AC circuit?
Answer: The total opposition to current flow including resistance and reactance
Impedance is the total opposition to AC current flow, combining both resistance (from resistors, measured in ohms) and reactance (from capacitors and inductors, also in ohms) into a single complex quantity.
In digital electronics, what logic operation does a NAND gate perform?
Answer: It outputs LOW only when ALL inputs are HIGH; otherwise outputs HIGH
A NAND gate (NOT-AND) outputs LOW only when ALL inputs are simultaneously HIGH. For any other combination (at least one LOW input), it outputs HIGH. It is the inverse of an AND gate.
What is the primary difference between a BJT (Bipolar Junction Transistor) and a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor)?
Answer: BJTs are controlled by base current; MOSFETs are controlled by gate voltage
A BJT is a current-controlled device where base current controls collector current. A MOSFET is a voltage-controlled device where gate voltage controls drain current — the gate draws essentially no current due to the insulating oxide layer.
What is the purpose of a ground in an electrical circuit?
Answer: Ground provides a common reference point and safety path for fault currents
Ground (earth ground or circuit common) provides a 0V reference point for all voltage measurements in the circuit and, in safety systems, provides a low-resistance path for fault currents to flow safely to earth rather than through a person.