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Understanding Energy, Current & Frequency Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. How does sound travel?

Question 2 2. In order to measure a sound's volume, you need to look at the _____ of the wave.

Question 3 3. How can you see noise on a graph?

Question 4 4. What is the unit of measurement for volume?

Question 5 5. _____ is the loudness of a sound.

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Question 6 6. You have a 12-volt battery and a 25-volt battery. Which one provides more electrical force?

Question 7 7. You have a 60W bulb and a 100W bulb. Which one will give you a brighter light?

Question 8 8. What do watts tell us about an electrical current?

Question 9 9. What does voltage tell us about electricity?

Question 10 10. What is electricity?

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Question 11 11. The electromagnetic waves in a microwave oven are created by the _____.

Question 12 12. An electromagnetic wave has a frequency of 3000 MHz, and is moving at the speed of light (approximately 299,800,000 m/s) - what is its wavelength (approximately)?

Question 13 13. If an ocean wave is traveling at 270 m/s, and has a wavelength of 200 km (200,000 m), what is the frequency of the wave?

Question 14 14. Find the velocity of a radio wave. They have a frequency of 2 kHz (2000 Hz) and a wavelength of 100 km.

Question 15 15. Frequencies of electromagnetic waves are measured in cycles per second, or _____.

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Question 16 16. A _____ is a circular path that electrons travel in a light bulb.

Question 17 17. The _____ is composed of two metal contacts, and it is covered with insulating material.

Question 18 18. This chemical element is used to make a thin wire that heats and glows in a light bulb.

Question 19 19. Which parts of the light bulb are connected to the filament and help keep electrons flowing?

Question 20 20. What types of gases are often used in light bulbs to avoid combustion or fires?

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Question 21 21. How do currents travel in a circuit?

Question 22 22. This type of circuit only has ONE path for the charges to travel. In this circuit, if one light or device goes out, nothing in the circuit will work.

Question 23 23. In order to power a circuit, you must have what of the following?

Question 24 24. This is a type of circuit that has multiple paths in which electrical charges can travel. If part of the circuit stops working, the current can travel through a another path.

Question 25 25. What would be an example of a series circuit?

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Question 26 26. What is a radio frequency band?

Question 27 27. What's the difference between AM and FM radio?

Question 28 28. Which of the following does NOT use radio waves?

Question 29 29. Which of the following uses radio frequencies on the lowest part of the spectrum?

Question 30 30. Which of the following is true of radio frequency bands?

Understanding Energy, Current & Frequency Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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