Led

A resistor is connected with the LED to

• protect the LED

• give power to the LED

The resistor connected to a LED has typical resistance values between:

• 10K - 20K

• 200R - 1K

• 2K - 8K

• 10R -100R

Which diodes are directly polarized

• D1

• D2

• Both

• None

Which diodes are directly polarized

• D1

• D2

• Both

• None

What is the primary function of a LED in electronic circuits?

• To emit light

• To store energy

• To amplify signals

• To convert AC to DC

Which material is commonly used as the semiconductor in LEDs?

• Silicon

• Gallium arsenide

• Copper

• Iron

What does LED stand for?

• Light Emitting Diode

• Light Energy Device

• Low Energy Diode

• Light Emission Device

In a LED, what determines the color of the emitted light?

• The voltage applied

• The type of semiconductor material

• The current passing through

• The size of the LED

Which of the following is a common application of LEDs?

• Data storage

• Lighting and displays

• Magnetic resonance imaging

• Chemical synthesis

What is the typical forward voltage range for a standard red LED?

• 1.8V to 2.2V

• 3.0V to 3.6V

• 0.5V to 1.0V

• 4.5V to 5.0V