LEDs on micro:bit

What does LED stand for?

• Luminous Electric Diode

• Light Energy Detector

• Luminous Electrical Device

• Light Emitting Diode

What is the main function of a diode?

• Store energy

• Produce light

• Act as a one-way valve for electricity

• Generate heat

How does a diode act as a one-way valve for electricity?

• It stores energy

• It prevents current from flowing in one direction

• It generates heat

• It allows current to flow in both directions

What is the by-product of electric current flowing through an LED?

• Heat

• Light

• Sound

• Magnetic field

What happens when you connect the positive wire to the positive lead on an LED?

• The LED turns on

• The LED blinks

• The LED turns off

• The LED changes color

What is the purpose of the LED on a power adapter?

• To charge the adapter

• To indicate that the adapter is on and receiving power

• To cool down the adapter

• To increase the adapter's lifespan

How is an LED used in remote controls?

• To improve the remote's grip

• To increase the remote's weight

• To communicate with the television using light pulses

• To emit sound signals

Why can't the human eye see the light emitted by the LED in a remote control?

• The light is too bright

• The light is in the infrared spectrum

• The light is ultraviolet

• The light is invisible

What is the advantage of using LEDs as a replacement for regular lightbulbs?

• They are heavier

• They consume more energy

• They provide better illumination

• They are cheaper

How many LEDs does the micro bit have on its front?

• 28

• 26

• 25

• 27