Electronics Practice Test Flashcards
7 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 7 Electronics Practice Test flashcards as text
What is the primary purpose of a voltage divider circuit?
Answer: Produce a fraction of the input voltage
A voltage divider uses two resistors in series to produce an output voltage that is a fraction of the input voltage.
In digital electronics, a flip-flop is used to:
Answer: Store a single binary bit
A flip-flop is a bistable circuit that stores one bit of binary information (either 0 or 1).
What does the term 'impedance' refer to in AC circuits?
Answer: Total opposition to AC current flow including reactance
Impedance (Z) is the total opposition to AC current, combining resistance and reactance (inductive and capacitive).
Which instrument is used to measure electrical power in a circuit?
Answer: Wattmeter
A wattmeter measures electrical power (in watts) consumed by a circuit or component.
What type of filter allows only frequencies above its cutoff frequency to pass?
Answer: High-pass filter
A high-pass filter attenuates frequencies below the cutoff and passes frequencies above it.
Ground fault circuit interrupters (GFCIs) protect against:
Answer: Electrical shock from current leakage to ground
GFCIs monitor current imbalance between hot and neutral wires and trip when even a small leakage current to ground is detected.
Which oscillator type uses an LC tank circuit to determine its frequency?
Answer: Hartley oscillator
The Hartley oscillator uses a tapped inductor in an LC tank circuit to set its oscillation frequency.