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Understanding P-N Junction and Solar Cells

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Questions and Answers

What is the purpose of calculating the series resistor value RS in an LED circuit?

To determine the power rating of the LED
To limit the forward current IF of the LED (correct)
To determine the supply voltage VS
To calculate the forward voltage drop VF of the LED

What is the main purpose of the RGB model in electronic systems?

To sense, represent, and display images (correct)
To sense and display audio signals
To amplify electrical signals
To filter out noise in electronic systems

How is white light generated in an RGB LED?

By combining 3 different colors like green, red, and blue (correct)
By using a single phosphor material
By using only two colors, red and green
By combining 4 different colors, green, red, blue, and yellow

What is the function of the long lead in an RGB LED?

To connect the internal anode to the supply (C) Signup and view all the answers

What is the structure of a common anode RGB LED?

4 terminals, including 1 anode, R, G, and B color pins (C) Signup and view all the answers

How are the colors controlled in a common anode RGB LED?

By applying a low power signal or by grounding the RGB pins and connecting the internal anode to the supply (B) Signup and view all the answers

What is the purpose of the internal anode in a common anode RGB LED?

To connect the anode to the supply (A) Signup and view all the answers

What is the difference between a common anode and common cathode RGB LED?

The connection of the internal anode/cathode to the supply (D) Signup and view all the answers

What is the purpose of the supply voltage VS in an LED circuit?

To power the LED and limit the current flowing through it (D) Signup and view all the answers

What is the formula used to calculate the series resistor value RS in an LED circuit?

RS = (VS - VF) / IF (A) Signup and view all the answers

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