Electronic Components and Devices Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electronic Components and Devices flashcards as text
What is the primary function of a Zener diode in a circuit?
Answer: Regulate voltage
A Zener diode is designed to operate in reverse breakdown to maintain a stable reference voltage.
Which transistor configuration provides the highest voltage gain?
Answer: Common emitter
The common emitter configuration provides the highest voltage gain among BJT configurations.
A capacitor has a capacitance of 100 µF and is charged to 50 V. What is the energy stored?
Answer: 0.125 J
Energy stored = ½CV² = ½ × 100×10⁻⁶ × 50² = 0.125 J.
What type of semiconductor material is created when silicon is doped with phosphorus?
Answer: N-type
Phosphorus has five valence electrons, donating an extra electron to silicon and creating N-type material.
Which component is used to protect a circuit from reverse polarity connection?
Answer: Series diode
A series diode blocks current when voltage is applied in reverse polarity, protecting the circuit.
An SCR (Silicon Controlled Rectifier) can be turned ON by applying a signal to which terminal?
Answer: Gate
A positive gate pulse triggers the SCR into conduction when the anode is positive with respect to the cathode.
What is the typical knee voltage for a silicon diode?
Answer: 0.7 V
Silicon diodes have a forward knee (threshold) voltage of approximately 0.7 V.