Reading Quiz

Question 1:

Answer:

1. nothing at this time
2. Everything from Monday's class was pretty clear but I think I'm still a little uncertain about p-n junctions and diodes. Re-reading the text and going over it myself might help. (By the way Monday's lab was the best lab ever.)
3. I'm okay, I liked the lab yesterday!
4. Nothing specific, though I plan on spending some time this week going over the recent material (since it is one of the more confusing sections) to make sure I have no additional questions.
5. I understand everything from class and the lab.
6. I think I understand most of the concepts we went over. I am still a little bit shaky on how a diode workes, and the p-n junction. I think a consise general review would help it settle into my mind.
7. I think I get everything.
8. why does my id card have to have the magentic pattern set up in that particular way?
9. Im still having trouble with the concept of fermi levels and how you can tell the difference between a conductor, semi conductor and insulator.
10. none
11. none :)
12. I understood everything in lab and in class.
13. electric charges and changing magnetic fields create electric fields. Magnetic fields are caused by moving electical charges and changing electric fields.
14. i need some help with capacitators and transformers
15. nothing...if was fun to see how a hard drive works in lab on monday
16. --
17. none
18. Can we go over again the different types of memory and what distinguishes one type from another?
19. I'm still a little confused about how a transistor works.
20. Things are pretty good right now, except for the fact that my "n" key is now sticking on my laptop so it actually took me 32 tries to get the word "now" as opposed to "ow".
22. the waves on binary code (still a little difficult determining north or south)
23. --

Question 2:

Answer:

1. Electric Fields-Electric charge, changing magnetic fields. Magnetic Fields-Moving electric charge, changing electric fields.
2. The sources of electric fields are electric charge and changing magnetic fields. The sources of magnetic fields are moving electric charge and changing electric fields.
3. Electric fields are created by either electric charge or by changing magnetic fields. Magnetic fields result from moving electric charge or from changing electric fields (or from a magnet).
4. The sources of electric fields are electric charges and changing magnetic fields. The sources of magnetic fields are moving electric charges (current) and changing electric fields.
5. Electric fields are caused by electric charge or changing magnetic fields, and magnetic fields are caused by moving electric charge or changing electric fields.
6. Electric fields are created by electric charges and by changing magnetic fields. One source of a magnetic field is a magnet. The second is a changing electric field.
7. Electric fields come from electric charge and from changing magnetic fields. Magnetic fields on the other hand, come from moving electric charge or from changing electric fields.
8. The sources of electric fields are electric charge and changing magnetic fields. The sources of maganetic fields are moving electric charge and changing electric fields.
9. The sources of electric fields are by electric charges andby changing magnetic fields. The sources of magnetic fields are by moving electric charges and by changing electric fields
10. sources of electric fields- electric charges and changing magnetic fields sources of magnetic fields- moving electric charges and changing electric fields
11. Electric fields can be produced by electric charges and by changing magnetic fields. Magnetic fields can be produced by moving electric charges.
12. The sources of Electric fiels are electrice charge and changing magnetic fields. The sources of magnetic fields are moving electric charge and changing electric fields.
13. speed of light = frequency * wavelength... 299,792,458 m/s = 900 Mhz * wavelength 333102.73 m
14. electric charges and changing magnetic fields create electric fields. Magnetic fields are caused by moving electical charges and changing electric fields.
15. the sources of electric fields are electric charge or a changing magnetic fields. the sources of magnetic fields are moving electric charge and changing electric fields.
16. electric charge and changing magnetic fields are sources of electric fields. moving electric charge and changing electric fields are sources of magnetic fields.
17. The sources of electric fields are electric charges and changing magnetic fields. The sources of magnetic fields are moving electric charges and changing electric fields.
18. Sources of electric fields: electric charge, changing magnetic fields Sources of magnetic field: moving electric charge, changing electric fields
19. Electric fields can come from electric charge or changing magnetic fields. Magnetic fields can come from moving electric charge or changing electric fields.
20. The sources of electric field are either electric charge or changing magnetic fields. Magnetic field is create by moving electric charge and changing electric fields.
21. A changing electric field gives us a magnetic field and a changing magnetic field results in an electric field
22. sources of electric fields: electric charge, changing magnetic fields sources of magnetic fields: moving electric charge, changing electric fields
23. Electric fields: electric charge and changing magnetic fields Magnetic fields: moving electric charge, magnets, and changing electric fields

Question 3:

Answer:

1. 299,792,458m/c= z x 900MHz 333102.73m
2. wavelength = (299,792,458 m/s) / (9,000,000 Hz) = 33.31 m
3. The wavelength would be about 0.33m.
4. wavelength x frequency = speed of wave wavelength = 1.12 x 10^-15 m
5. 3x10^8 m/s = wavelength x 900x10^6 Hz, so wavelenth = .33 m
6. (Wavelength)(Frequency)=Speed of wave. (wavelength)(900,000,000)= 299,792,458 Wavelength = .333 meters
7. The wavelength is equal to the speed divided by the frequency, so the wavelength is 299,792,458 meters per second divided by 900 million Hz.So the wavelength must be about .03 meters.
8. wavelength = .33310 m
9. v = f w 299,792,458 = 900 million (w) wave length = .33m
10. wave speed = wavelength * frequency 299 792 458 m/s = wavelength * 900 000 000 cycles/sec wavelength = .333103 m
11. 3.33x10^-4 m
12. 299,792,458/900,000,000hz= wavelength 0.333meters (is this right?)
13. am stands for amplitude modulation, and fm stands for frequency modulation
14. speed of light = frequency * wavelength... 299,792,458 m/s = 900 Mhz * wavelength 333102.73 m
15. 333103
16. 299,792,458 = 900,000,000 Hz x wavelength so wavelength= .333 meters.
17. f = 1/wavelength 900,000,000Hz = 1/ wavelength wavelength = 1.11 x 10^-9 m
18. 0.333 m
19. wavelength = speed of light/frequency, so doing the calculation the wavelength is .000333 m
20. speed of light = wavelength x frequency wavelength = 1/3 (not sure of units)
21. .001 meters? wavelength = 1/frequency
22. wavelength =speed/frequency = (299,792,458 m/s)/(1,000,000 Hz) = 299.792458 (m/s)/Hz
23. I don't know

Question 4:

Answer:

1. AM-Amplitude Modulation FM-Frequency Modulation
2. AM is amplitude modulation and FM is frequency modulation
3. AM stands for amplitude modulation, and FM stands for frequency modulation. Both are the way air density fluctuations are represented. AM uses the strength of the transmitted wave, and FM uses its frequency.
4. AM stands for amplitude modulation; FM stands for frequency modulation.
5. AM is amplitude modulation and FM is frequency modulation.
6. AM stands for amplitude modulation. FM stands for Frequency modulation.
7. AM stands for amplitude modulation, and FM stands for frequency modulation. Radio stations can use either one (depending on whether they are AM or FM stations) to broadcast their actual sound (music, voices) within a certain range of the frequency they broadcast at.
8. AM stands for amplitude modulation, and FM stands for frequency modulation.
9. AM stands for amplitude modulation. FM stands for frequency modulation.
10. AM- amplitude modulation- amount of charge traveling up and down the antenna changes FM- frequency modulation- speed of charge travel up and down the antenna changes
11. AM= amplitude modulation, the amplitude of the waves change to send sound. FM= frequency modulation, the frequency of the waves changes to send sound
12. AM is amplitude modulation and FM is frequency modulation.
13. I don't get tank circuits, and i could use some clarification about how am and fm waves work
14. am stands for amplitude modulation, and fm stands for frequency modulation
15. AM=amplitude modulation. FM= fquency modulation
16. Amplitude modulation and frequency modulation
17. AM stands for amplitude modulation. FM stands for frequency modulation.
18. AM stands for amplitude modulation, which represents air density by the stength of the transmitted wave. FM stands for frequency modulation, which represents air density by the frequency of the transmitted wave.
19. AM stands for amplitude modulation and FM stands for frequency modulation.
20. Amplitude modulation which means the method which AM stations use to send sound using radio waves is modulating the amplitude of the waves to change the sound. Frequency modulation is when an FM station changes the frequency of the radio wave it is sending.
21. AM= amplitude modulation FM=frequency modulation
22. AM = amplitude modulation FM = frequency modulation
23. Am stands for amplitude modulation and FM stands for frequency modulation.

Question 5:

Answer:

1. Vertical/Horozontal Polaritzation
2. The section on tank circuits was confusing.
3. I was okay with this section.
4. I found the equation to use for question 3 in my notes, but I didn't see it in the section about waves (not a major concern, but I want to be sure I didn't miss anything).
5. How the moving charge from the transmitting antenna creates moving charge in receiving antennas far away.
6. I dont understand exactly how a radio wave travels through nothing. I thought that a wave needed a medium to travel through such as water or air.
8. not really, thanks.
9. I was confused with the concpet of inductance.
10. vertical and horizontal polarization
11. none
12. I think this all makes sense.
13. I don't get tank circuits, and i could use some clarification about how am and fm waves work
14. I dont really understand how the antenna works, and what it means when it says 'horizontal' or 'vertical wavelengths
15. ----
16. none
17. Can we talk about the polarization of waves (vertical, horizontal, circular)?
18. I don't really understand what vertical polarization and horizontal polarization are and also the idea that radio stations transmit circularly polarized waves.
19. nope
21. question 3 and tank circuits
22. --