What is the **main difference** between electrical and electronic devices?
A
Electronics use AC only
B
Electronics involve control of electron flow using semiconductor devices
C
Electronics require mechanical parts
Analysis & Theory
Electronics deals with the control of electron flow using devices like diodes and transistors, while electrical systems handle power transmission.
Which of the following is a **basic electronic component**?
Analysis & Theory
Resistors are passive electronic components that limit current flow.
What type of materials are used to manufacture **semiconductors**?
Analysis & Theory
Semiconductors are made from elements like silicon and germanium with intermediate conductivity.
In a **conductor**, electric current is due to:
Analysis & Theory
In conductors like metals, free electrons move and constitute electric current.
Which electronic component allows current to flow in **only one direction**?
Analysis & Theory
A diode is a semiconductor device that permits current flow in one direction only.
Which device is known as a **switching and amplifying** component?
Analysis & Theory
Transistors are widely used in electronics for switching and amplification.
Which of the following is a **passive** electronic component?
Analysis & Theory
Passive components like resistors do not require power to operate or amplify signals.
Which of the following is a characteristic of **semiconductors**?
B
High conductivity at all temperatures
C
Conductivity increases with temperature
D
Cannot conduct electricity
Analysis & Theory
Unlike metals, semiconductors conduct better at higher temperatures.
The SI unit of **electric current** is:
Analysis & Theory
Current is measured in amperes (A), which is the flow of charge per unit time.
What is the **basic building block** of modern electronic circuits?
Analysis & Theory
Transistors are the core elements of all modern digital and analog electronic devices.