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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the hot resistance of a 6V, 0.3A incandescent bulb?
💡 Hint: Use the formula R = V/I.
Question 2
Easy
What is the cold resistance of a typical incandescent bulb?
💡 Hint: It’s based on the hot resistance divided by a certain ratio.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What characteristic increases for incandescent bulbs as temperature rises?
- Voltage
- Current
- Resistance
💡 Hint: Think about how heat affects materials.
Question 2
LEDs require a current limiting resistor to operate safely. True or False?
- True
- False
💡 Hint: Consider why current needs to be controlled.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a circuit with three LEDs, each having a forward voltage of 2.0V, connected to a 12V power supply. Calculate resistor values for each to maintain a current of 25mA.
💡 Hint: Apply the formula for each LED individually.
Question 2
If you replace an incandescent bulb in a circuit with two parallel LEDs, calculate the total current drawn if each LED has a forward voltage of 2V from a 12V supply.
💡 Hint: Calculate each LED separately first.
Challenge and get performance evaluation