Basic Electronics & Circuitry Flashcards
7 cards from real Ham Radio Technician Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Basic Electronics & Circuitry flashcards as text
What is the function of an RF choke in a ham radio circuit?
Answer: Block RF while passing DC
An RF choke is an inductor designed to block high-frequency RF signals while allowing DC to pass.
What happens to inductive reactance as frequency increases?
Answer: It increases
Inductive reactance (XL = 2πfL) increases proportionally with frequency.
What is the purpose of a bypass capacitor in an amplifier circuit?
Answer: Provide a low-impedance path for AC signals around a resistor
A bypass capacitor provides a low-impedance AC path around a resistor, preventing signal loss.
In a transistor, what are the three terminals called?
Answer: Emitter, base, collector
A bipolar junction transistor (BJT) has emitter, base, and collector terminals.
What is the resonant frequency of an LC circuit?
Answer: The frequency at which inductive and capacitive reactances are equal
At resonance, XL equals XC, and the circuit oscillates at its natural frequency.
What does the prefix 'pico' represent in electronics?
Answer: One trillionth (10⁻¹²)
Pico (p) represents 10⁻¹², so one picofarad equals 0.000000000001 farads.
What is the primary purpose of a voltage regulator in a power supply?
Answer: Maintain a constant output voltage despite input or load changes
A voltage regulator holds the output voltage steady regardless of input fluctuations or varying load current.