which of the following parameters is used to control the colour of an RGB LED?
a) current
b) resistance
c) voltage
d) impedance
Answers
Answer:
Resistance
Explanation:
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Answer:
Current is the correct answer.
Explanation:
Current is the parameter used to control the colour of an RGB LED.
a) Current:
The current flowing through an RGB LED is used to control its brightness and intensity. The amount of current flowing through the LED determines the amount of light produced by it. In the case of RGB LEDs, the amount of current flowing through each of the three colour channels (Red, Green, and Blue) can be varied independently to achieve the desired colour and brightness.
b) Resistance:
The resistance of the LED determines the amount of current that can flow through it. A higher resistance will restrict the flow of current, resulting in a dimmer LED. The resistance of an RGB LED can be adjusted by using a resistor in series with the LED. By selecting an appropriate resistor value, the amount of current flowing through the LED can be controlled.
c) Voltage:
The voltage applied to an RGB LED affects its brightness and colour. The higher voltage will result in a brighter LED. However, excessive voltage can damage the LED. The voltage applied to an RGB LED can be controlled using a voltage regulator or resistors in series with the LED.
d) Impedance:
Impedance is a unit of measurement for the resistance to current passage in an electrical circuit. In the case of an RGB LED, the impedance of each colour channel can be adjusted to control the amount of current flowing through it. This can be done using passive components like resistors, inductors, or capacitors. By selecting appropriate values for these components, the impedance of the LED can be controlled to achieve the desired colour and brightness.
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