CET Electronic Components and Devices 2

Question 1

What is the primary function of a Zener diode in a circuit?

Accepted Answer

Regulate voltage

Answer

A Zener diode is designed to operate in reverse breakdown to maintain a stable reference voltage.

Question 2

Which transistor configuration provides the highest voltage gain?

Accepted Answer

Common emitter

Answer

The common emitter configuration provides the highest voltage gain among BJT configurations.

Question 3

A capacitor has a capacitance of 100 µF and is charged to 50 V. What is the energy stored?

Accepted Answer

0.125 J

Answer

Energy stored = ½CV² = ½ × 100×10⁻⁶ × 50² = 0.125 J.

Question 4

What type of semiconductor material is created when silicon is doped with phosphorus?

Accepted Answer

N-type

Answer

Phosphorus has five valence electrons, donating an extra electron to silicon and creating N-type material.

Question 5

Which component is used to protect a circuit from reverse polarity connection?

Accepted Answer

Series diode

Answer

A series diode blocks current when voltage is applied in reverse polarity, protecting the circuit.

(CET) Certified Electronics Technician Practice Test