Introduction: LED

What happens if you connect an LED with reversed polarity (cathode to positive and anode to negative)?

• The LED will emit light but dimly.

• The LED will emit light normally.

• The LED will not emit light and could be damaged.

• The LED will emit a different color.

Which leg of an LED is the cathode normally?

• The longer leg.

• The shorter leg.

• Both legs.

• Neither leg, LEDs don’t have a cathode.

What could happen if an LED is connected without a resistor?

• The LED will work more efficiently.

• The LED could burn out due to excessive current.

• The LED will automatically adjust its brightness.

• The LED will work as usual.

What should you consider when selecting a power supply for an LED?

• The color of the LED.

• The number of pins on the LED.

• The current and voltage requirements of the LED.

• The size of the LED.