LED Quiz

What does LED stand for?

(a)  

When does an LED emit light?

• When the exit voltage is zero

• When the power rating is greater than 1

• When a current pass through it

• When the inductance value is greater then the voltage

What kind of device is an LED?

• Conductor

• Semiconductor

• Insulator

• Superconductor

What is an LED commonly described as due to the way its light generates within the solid semiconductor material?

• A gas discharge device

• A solid-state device

• A mechanical device

• A super conductor device

What are photons?

• Semiconductor materials

• Subatomic particles with a positive charge

• Light particles

• Subatomic particles with a neutral charge

What determines the color of the light emitted by an LED?

• The size of the LED

• The wavelength of the emitted light

• The weight of the LED

What happens when an electric current is passed through an LED?

• It cools down the device

• It emits sound

• It emits light

• It stops functioning

What is the primary advantage of using parallel LED circuits as opposed to series LED circuits?

• They require a higher voltage source.

• They can light several LEDs with a minimum voltage.

What is a potential disadvantage of connecting LEDs in parallel?

• It can shorten the lifespan of the LED.

• It increases the brightness of the LEDs.

• It reduces the voltage requirement.

• It simplifies the circuit design.

What is the forward voltage required for a red LED to conduct electricity?

• 1.8 V

• 2.1 V

• 2.2 V

• 3.2 V