4 - Building a Simple Circuit
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Practice Questions
Test your understanding with targeted questions
What is the purpose of a resistor in an LED circuit?
💡 Hint: Think about what happens if too much current flows.
Which leg of the LED is usually longer?
💡 Hint: Remember the positive and negative sides.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the role of the resistor when connecting an LED?
💡 Hint: Think about what could happen to the LED with too much current.
True or False: The long leg of the LED is the negative connection.
💡 Hint: Remember how to identify the anode and cathode of the LED.
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Challenge Problems
Push your limits with advanced challenges
You wish to power a red LED with a forward voltage of 2V and a forward current of 20mA using a 5V source. What resistor value do you need?
💡 Hint: Subtract the LED forward voltage from the supply voltage before dividing by the current.
What will happen if you incorrectly connect the LED polarity?
💡 Hint: Think about how current flows in a LED.
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Reference links
Supplementary resources to enhance your learning experience.