screws dll I compared to the c ation goes up. The ther. To prevent the plates 2.
ID: 3349527 • Letter: S
Question
screws dll I compared to the c ation goes up. The ther. To prevent the plates 2. With the two part of the capacitor), use the nrobes to the oway from each other whill e separation in the Go Section IIl: Impedance of capacitors During the time that current is flowing onto one plate of the capacitor, current is also flowing out of the other plate. Because of this, it can look like current is flowing through the capacitor when, in fact, one plate is gaining positive charge while the other plate is gaining negaive charge. There is a limit, however, to how much charge will accumulate on each plate. As the charge accumulates', the voltage across the capacitor increases. Eventually, the voltage equals the applied voltage and no more charge accumulates. How much charge accumulates depends on the capacitor. Some capacitors, like the green capacitor can store a lot. Others, like the small brown capacitor, can only store a little. 13. Set up a circuit in which your light bulb and function generator are connected in series. Set it up so 14. One of the capacitors looks like a small, flat brown pancake. Insert that capacitor in series with 15. Find a frequency at which the light bulb lights. Hint: The impedance of the capacitor is inversely Question #16. At what minimum frequency does the bulb light when used with the following that the bulb lights with a medium brightness. the light bulb. proportional to the frequency capacitors? For polarized capacitors, remember to have the minus side of the capacitor toward the minus side of the function generator. a. The small brown capacitor? b. The black one? c. The dark blue one? You should have found that the larger the capacitor, the lower the frequency can be to have the bulb In cach case, equilibrium is reached quickly, but in that short time there is still a tiny amount of currer light. However, the bulb can still light with a small capacitor as long as the frequency is high enough. that can flow before equilibrium is reached. Thus, when the current switches directions very quickly, as it does when the frequency is very high, the current switches direction before equilibrium is reache Consequently, current flows for a very short time, at which point the current changes direction and then flows in the opposite direction. This repeats itself over and over again, so that the current continues to flow, albeit in a repetitive off-and-on, process characteristic of high-frequency AC current. Question #17. A capacitor can store charge. How does this allow current to flow when it oscillates a high frequency? Question #18. Why is a higher frequency needed to make the bulb light with the smaller capacitor?
Explanation / Answer
Hello,
Please find the answers to Q17 and Q18 attached as under. Please give a thumbs up rating if you find the answer useful! Have a rocking day ahead!
NOTE: The answers to the other questions would depend on the exact measurements that you have done in the lab, and also the values of the capacitors. Since I do not have these values, I will post the answers once you provide the complete details.
17. A capacitor is a device which is used to hold charge. However, it is also a medium which provides impedance to frequency inputs. In other words, we know that the currrent through a capacitor is given by the capacitance times the rate of change of voltage across it. Thus, a frequeny input will make the voltage across the capacitor oscillate. This in turn means that the rate of change of voltage across it is non-zero, which further means that it allows flow of current.
18. A small capacitor offers a high impedance at low frequencies. This can be seen by the fact that the impedance of a capacitor is given by 1/(wC), where w is the input frequency in radians/s and C is the capacitance. Thus, a higher value of w i.e. frequency is needed to reduce the impedance, thus make the bulb glow.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.