Basic Electronics NABTEB past questions and answers

Basic Electronics NABTEB past questions and answers

What does ADC stand for in electronics?

A) Analog-to-Digital Converter (Correct)

B) Advanced Digital Circuit

C) Alternating Data Carrier

D) Analog Data Collector

What is the function of a potentiometer in a circuit?

A) Adjustable resistance (Correct)

B) Voltage regulation

C) Current amplification

D) Frequency modulation

What component is used to amplify and filter specific frequencies in a circuit?

A) Filter (Correct)

B) Amplifier

C) Transistor

D) Resistor

Which law states that the voltage across a capacitor is proportional to the rate of change of the electric charge stored in it?

A) Faraday's Law (Correct)

B) Kirchhoff's Voltage Law

C) Ohm's Law

D) Lenz's Law

What is the purpose of a relay in electronics?

A) Control a high-power circuit with a low-power signal (Correct)

B) Amplify signals

C) Convert AC to DC

D) Store electrical charge

What device is used to protect sensitive electronic circuits from voltage spikes or surges?

A) Surge protector (Correct)

B) Transformer

C) Inductor

D) Rectifier

What component is used to control the flow of current in a circuit?

A) Transistor (Correct)

B) Capacitor

C) Inductor

D) Diode

What is the purpose of a thermistor in electronics?

A) Temperature sensing (Correct)

B) Voltage regulation

C) Signal amplification

D) Current flow control

Which device is used to convert mechanical energy into electrical energy?

A) Generator (Correct)

B) Resistor

C) Capacitor

D) Transistor

What does RAM stand for in computer electronics?

A) Random Access Memory (Correct)

B) Read-Only Memory

C) Real-time Analog Modulation

D) Rapidly Alterable Module

What is the function of a choke in an electronic circuit?

A) Limits high-frequency noise (Correct)

B) Increases resistance

C) Stores energy

D) Controls current flow

What component is used to create a delay in an electronic circuit?

A) Capacitor (Correct)

B) Resistor

C) Transistor

D) Inductor

What device is used to measure the amount of electric charge in a circuit?

A) Coulombmeter (Correct)

B) Ammeter

C) Voltmeter

D) Ohmmeter

What does EEPROM stand for in electronics?

A) Electrically Erasable Programmable Read-Only Memory (Correct)

B) External Erasable Programming Module

C) Electrically Operated Output Memory

D) Efficiently Organized Operational Module

Which law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them?

A) Coulomb's Law (Correct)

B) Ohm's Law

C) Newton's Law

D) Faraday's Law

What does UART stand for in electronics?

A) Universal Asynchronous Receiver/Transmitter (Correct)

B) Unified Analog Receiver/Transmitter

C) Ultrafast Automated Response Technology

D) Uniform Analog Remote Terminal

What component is used to temporarily store data in a circuit?

A) Capacitor (Correct)

B) Resistor

C) Diode

D) Transistor

What is the function of a varistor in electronics?

A) Protects against voltage surges (Correct)

B) Amplifies signals

C) Regulates current

D) Stores electrical charge

What does PLL stand for in electronics?

A) Phase-Locked Loop (Correct)

B) Pulse Length Limitation

C) Power Line Link

D) Programmable Logic Latch

What device is used to control the flow of electrons in a vacuum?

A) Vacuum tube (Correct)

B) Semiconductor

C) Resistor

D) Inductor