LEDs

The LED stands for

• Light Emitting Diode

• Light Editing Diode

• Little Emitting Diode

• Lead Emitting Diode

Answer explanation

The correct answer is 'Light Emitting Diode' as it accurately describes the function of an LED, which emits light when an electric current passes through it. The other options are incorrect and do not represent the technology.

The LED is in the _______ family

• Integrated Circuit

• Transistor

• Semiconductor

• Capacitor

Answer explanation

The LED (Light Emitting Diode) is a type of semiconductor device that emits light when an electric current passes through it. Therefore, it belongs to the semiconductor family, making 'Semiconductor' the correct choice.

Which is the symbol for an LED?

• A

• B

Answer explanation

The symbol for an LED is represented by choice B. This symbol typically consists of a diode with arrows indicating light emission, distinguishing it from other electronic components.

Which side is negative?

• A

• B

Answer explanation

In this context, side B is identified as negative. This is often determined by the polarity of the components involved, where B exhibits the characteristics of a negative charge.

Which way does current flow?

• A -> B

• B -> A

Answer explanation

Current flows from A to B, following the conventional direction of electric current, which is from positive to negative. Therefore, the correct answer is A -> B.

What is the name of the negative end?

• Anode

• Cathode

Answer explanation

The negative end of a battery or an electrochemical cell is called the cathode. In contrast, the anode is the positive end. Therefore, the correct answer is cathode.

What is the name of the positive end?

• Anode

• Cathode

Answer explanation

The positive end in an electrical circuit is called the anode. It is where current flows into a device, distinguishing it from the cathode, which is the negative end.

Which way do you tell the negative end of the LED?

• Shorter lead

• Longer lead

• Both leads are equal so you can't tell

Answer explanation

The negative end of an LED is indicated by the shorter lead. The longer lead represents the positive end. This distinction helps in correctly connecting the LED in a circuit.

Which way do you tell the negative end of the LED?

• Flat side of the LED

• Non Flat side of LED

Answer explanation

The flat side of the LED indicates the negative end (cathode). This design helps users easily identify the correct orientation for installation, ensuring proper functionality.

What happens if you place an LED in the wrong direction?

• It burns out

• Doesn't light up

• Blows up

Answer explanation

An LED has a positive (anode) and a negative (cathode) side. If placed in the wrong direction, it won't allow current to flow, resulting in it not lighting up. Therefore, the correct answer is that it doesn't light up.