LEDs Quiz

William, Daniel, and Liam are having a debate. William thinks LED stands for Light Emitting Diode, Daniel thinks it's Laser Emitting Diode, and Liam believes it's Light Energy Detector. Who is correct?

• William with Light Emitting Diode

• Daniel with Laser Emitting Diode

• Liam with Light Energy Detector

• None of them

Carlos is trying to fix his old radio. He knows that a certain component is crucial for routing electricity within the circuit. What is this component called in English?

• Diode

• Resistor

• Capacitor

• Inductor

Imagine Maria, Carlos, and Juan are working on a school project involving an LED circuit for their Spanish class. They have a current limiting resistor. Can you guess why they would use it in their LED circuit?

• To make their LED shine like a mini-sun

• To turn their LED into a disco light, changing colors

• To keep their LED from going 'BOOM!' and turning into a mini firework

• To make their LED beam point in any direction they want

Mason, Abigail, and Aiden are working on a project involving a standard 5mm LED. They are having a debate. How can they identify the anode from the cathode?

• Mason suggests that the body of the LED has a flat spot on the cathode side

• Abigail thinks the body of the LED has a flat spot on the anode side

• Aiden believes the leg connected to the cathode is longer

• They all agree that the leg connected to the anode is longer

Carlos is a student who is working on a science project about LEDs. He needs to measure the brightness of an LED. Which unit should he use?

• Watts

• Candela

• Lumens

• MCD

Imagine Miguel, Abigail, and Priya are working on a school project. They are planning a surprise party and want to adjust the brightness of the LED lights for the party. They have an LED and a 1K potentiometer. Can you help them?

• They can disconnect the LED from the circuit

• They can increase the resistance to maximum

• They can decrease the resistance to minimum

• They can sweep the resistance between 0 and 1K ohms

What happens when you put different colored LEDs in parallel without individual current limiting resistors?

• The LEDs may be destroyed by too much or too little current

• The LEDs will all glow with the same brightness

• The LEDs will change colors randomly

• The LEDs will not light up at all

During a science fair, a group of students who know a little Spanish are demonstrating the difference between a traditional light bulb and an LED. What is the main difference they should highlight?

• LEDs require a big power source, while light bulbs draw very little energy

• LEDs are omnidirectional in light production, while light bulbs emit light in a beam at a certain angle

• LEDs are non polarized, while light bulbs have a right and wrong way to connect electricity

• LEDs emit photons when electricity flows through a semiconductor, while light bulbs heat up a filament to emit light