Question:

Figure 22-19 R = 1 M2 + V = 300 V C= 1 uF 22-31 Assume that Cin Fig. 22–19 is completely discharged with S, in Position 2. If S,

Figure 22-19 R = 1 M2 + V = 300 V C= 1 uF 22-31 Assume that Cin Fig. 22–19 is completely discharged with S, in Position 2. If S, is moved to Position 1, how much is the capacitor voltage at the following time intervals? a. t=0 s. b. t=0.7 s. c. t=1 s. d. t=1.5 s. e. t=2s. f. t= 2.5 s. g. t= 3.5 s.

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Review | Constants
Part A
Cell membranes (the walled enclosure around a cell) are
typically about d = 7.7 mm thick. They are partially
permeable to allow charged material to pass in and out,
as needed. Equal but opposite charge densities build up
on the in

Physics

Capacitors Solutions

Review | Constants Part A Cell membranes (the walled enclosure around a cell) are typically about d = 7.7 mm thick. They are partially permeable to allow charged material to pass in and out, as needed. Equal but opposite charge densities build up on the inside and outside faces of such a membrane, and these charges prevent additional charges from passing through the cell wall. We can model a cell membrane as a parallel-plate capacitor, with the membrane itself containing proteins embedded in an organic material to give the membrane a dielectric constant of about 12. (See (Figure 1).) What is the capacitance per square centimeter of such a cell wall? Express your answer in microfarads per squared centimeter. AEO RE ? For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Effect of a dielectric C= 8.73 • 10-9 4F/cm² Figure 1 of 1 Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining d Outside axon + V + + + + + + + + Axon membrane y Part B ✓ In its normal resting state, a cell has a potential difference 85 mV across its membrane. What is the electric field inside this membrane? Inside axon Express your answer in volts per meter.

(Note: Continue the Table:/, unless the capacitor fully charged /discharged)
Table:1 (charging and discharging the given capacitor)
#
Time
(s)
0
10
Charging
voltage (V)
0.00
1.70
3.20
4.40
5.34
6.11
6.79
7.35
Discharging
voltage (V)
8.90
7.91
6.61
5.33
4.6

Physics

Capacitors Solutions

(Note: Continue the Table:/, unless the capacitor fully charged /discharged) Table:1 (charging and discharging the given capacitor) # Time (s) 0 10 Charging voltage (V) 0.00 1.70 3.20 4.40 5.34 6.11 6.79 7.35 Discharging voltage (V) 8.90 7.91 6.61 5.33 4.60 20 30 40 50 3.70 3.10 60 70 2.50 80 90 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 7.69 8.04 8.36 100 2.10 1.70 1.40 1.18 0.96 0.80 110 120 130 140 8.58 8.79 8.95 150 160 170 9.11 9.22 9.33 9.39 9.45 9.52 0.63 0.53 0.44 0.35 0.28 180 190 200 210 9.55 0.22 0.17 0.13 9.60 . 23 24 25 26 220 230 240 250 9.63 9.66 9.69 9.70 0.09 0.07 0.04 0.03 Claculation: Plot suitable graphs for charging and discharging the given capacitor. • Calculate the time constant (t) from discharging process (38 % of the initial value). .

Part C
The plates of a parallel-plate capacitor have a
separation of 2.78 mm, and each has an area of
16.2 cm. Each plate carries a charge of
magnitude 6.35x10-8 C. The plates are in vacuum.
What is the magnitude of the electric field
between the plates?
E

Physics

Capacitors Solutions

Part C The plates of a parallel-plate capacitor have a separation of 2.78 mm, and each has an area of 16.2 cm. Each plate carries a charge of magnitude 6.35x10-8 C. The plates are in vacuum. What is the magnitude of the electric field between the plates? Express your answer with the appropriate units. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Properties of a parallel-plate capacitor. HA LO ? Value E Units