L9 S&C Electronics

What is the function of a diode?

• Allows current to flow in both directions

• Allows current to flow in one direction only

• Blocks all current flow

• Increases current flow

What are the two leads of a diode called?

• Anode and cathode

• Source and drain

• Input and output

• Positive and negative

What does LED stand for?

• Laser Emitting Diode

• Low Energy Diode

• Light Energy Diode

• Light Emitting Diode

What is the purpose of a resistor in an LED circuit?

• To limit the current

• To change the color of the light

• To increase the voltage

• To store energy

What is the typical maximum current for an LED?

• 50mA

• 20mA

• 10mA

• 5mA

What happens when a diode is in reverse bias?

• It emits light

• It increases current flow

• It blocks current flow

• It allows current to flow

What is a common use of diodes in circuits?

• To measure voltage

• To rectify current

• To amplify signals

• To store energy

What is the voltage drop across a typical LED?

• 1V

• 3V

• 4V

• 2V

What type of display uses multiple diodes to show numbers?

• CRT

• Seven segment display

• LED

• LCD

In a common cathode seven segment display, what is connected together?

• Ground

• Power supply

• Cathodes of all LEDs

• Anodes of all LEDs