Electronic Symbols

Multiple Choice

Which of the following best describes the purpose of electronic symbols in circuit diagrams?

• To represent various electrical and electronic devices or functions

• To indicate the color of wires

• To show the physical size of components

• To display the voltage rating of components

Multiple Select

Which of the following are recognized standards for electronic symbols according to the lesson?

• IEC 60617

• IEEE Std 91/91a

• ANSI Y32.2-1975

• ISO 9001

Open Ended

List two international or national standards organizations that provide graphic symbols for electrical components in circuit diagrams.

Multiple Choice

Which of the following symbols represents a controlled voltage source?

• A circle with + and - signs inside

• A diamond with + and - signs inside

• A circle with an arrow inside

• A circle with a sine wave inside

Open Ended

What is the main difference between a voltage source and a current source as shown in the images?

Multiple Select

Which of the following are types of resistors shown in the image?

• Attenuator

• Memristor

• Preset Resistor

• Capacitor

Fill in the Blanks

The symbol for a variable capacitor is represented by a capacitor symbol with a

through it.

Multiple Choice

Which of the following symbols represents a diode (rectifier)?

• A triangle with a line at the tip

• A circle with a sine wave

• A diamond with an arrow

• A rectangle with a zigzag line

Open Ended

Explain the difference between a light-emitting diode (LED) and a photodiode based on their symbols and function.

Multiple Choice

Which type of inductor is represented by the symbol with a magnetic core according to IEEE Std 315?

• IEC-style air-cored inductor

• Inductor with magnetic core

• IEC-style tapped inductor

• Variable inductor

Open Ended

Compare the symbols for transformers and inductors. What is the key visual difference between them, and what does this difference represent in terms of their electrical function?

Multiple Choice

Which terminals are associated with the collector, base, and emitter in the NPN bipolar junction transistor (BJT) symbol?

• A, B, C

• B, C, E

• E, B, C

• C, E, B

Fill in the Blanks

A switch that can connect a common terminal to either of two other terminals is called a

switch.

Multiple Select

Select all the correct descriptions for the pushbutton, momentary or spring-return switches shown in the image.

• Make (IEEE Std 315)

• Break (IEEE Std 315)

• Two-circuit (IEEE Std 315)

• Double-pole, double-throw

Open Ended

Explain how the relay types SPST, SPDT, DPST, and DPDT differ in terms of their switching mechanisms and applications.

Multiple Choice

Which of the following symbols represents an incandescent lamp?

• The symbol with a circle and a cross inside it

• The symbol with two parallel lines and a dot

• The symbol with a square and a diagonal line

• The symbol with a triangle and a line

Open Ended

Compare the symbols for the neon lamp and the incandescent lamp. What are the key differences in their representations?

Multiple Select

Which of the following are types of fuses shown in the image?

• Thermal Fuse

• Neon Fuse

• Fast blow Fuse

• IEC Standard

Fill in the Blanks

The symbol for a

is shown as a circle with two lines coming out and a small rectangle inside the circle.

Open Ended

Identify two differences between the IEC-style antenna and the IEC-style loop antenna symbols.

Multiple Choice

Which column in the diagram contains the symbol for a resistor?

• CAPACITORS

• RESISTORS

• OUTPUT DEVICES

• LOGIC GATES

Open Ended

What is one question you still have about the different symbols used in electronics or electrical circuits?

Multiple Choice

What is the function of the switch in the given electrical circuit diagram?

• To open or close the circuit

• To provide power to the circuit

• To increase the brightness of the bulb

• To change the direction of current