Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) You can also print these out and jot down your answers in your science notebook.
Click here for a printer-friendly version of the exercises and answers for Unit 14.
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1. What is a momentary contact switch?
2. What is an LED?
3. What is a piezo buzzer?
4. What is a relay?
5. What is a meter?
6. What is a potentiometer?
7. What is a photoresistor?
8. What is a 555 timer?
9. Using the formula R = V / I calculate the resistance value of a circuit with 12 volts and 1 amp of current.
10. Using the formula I = V / R, calculate the current a circuit is using with 12 volts and 100 ohms of resistance.
11. Using the formula E = I * R, calculate the voltage of a circuit that has a resistance of 100 ohms and is using 150 milliamps of current.
12. What happens if we connect an LED’s anode to ground and the cathode to positive voltage?
13. Why do we use a transformer in the audio experiments using the speaker?
14. What is a voltage divider?
15. What is a seven segment display?
16. What are the two types of transistors?
17. Why do we use transistors in electronics?
18. What is a voltage regulator?
19. What is the full name of an Op-Amp?
20. What does an Op-Amp do?
21. What is a bargraph?
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