Item 13 Cell Membranes and Dielectrics Many cells in the body have a cell membrane whose inner and outer surfaces carry opposite charges, just like the plates of a parallel-plate capacitor. Suppose a typical cell membrane has a thickness of 8.5x109 m, and its inner and outer surfaces carry charge densities of -6.4x10-4 C/m² and +6.4x10-4 C/m², respectively. In addition, assume that the material in the cell membrane has a dielectric constant of 5.4. ▼ Part A Find the direction of the electric field within the cell membrane. O into the cell O out of the cell Submit Request Answer Part B Find the magnitude of the electric field within the cell membrane. Express your answer using two significant figures. 197| ΑΣΦ h → C E= Submit Part C |AV|= Request Answer Submit Calculate the potential difference between the inner and outer walls of the membrane. Express your answer using two significant figures. —| ΑΣΦ h ? Request Answer N/C ? mV

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Item 13
Cell Membranes and Dielectrics Many cells in the body have a cell
membrane whose inner and outer surfaces carry opposite charges, just like
the plates of a parallel-plate capacitor. Suppose a typical cell membrane has
a thickness of 8.5x109 m, and its inner and outer surfaces carry charge
densities of -6.4×10-4 C/m² and +6.4×10-4 C/m², respectively. In
addition, assume that the material in the cell membrane has a dielectric
constant of 5.4.
Part A
Find the direction of the electric field within the cell membrane.
into the cell
O out of the cell
Submit
Part B
E =
Find the magnitude of the electric field within the cell membrane.
Express your answer using two significant figures.
—| ΑΣΦ
Submit
Part C
Request Answer
|AV| =
Submit
Request Answer
Calculate the potential difference between the inner and outer walls of the membrane.
Express your answer using two significant figures.
17 ΑΣΦ
# ?
Request Answer
N/C
?
mV
Transcribed Image Text:Item 13 Cell Membranes and Dielectrics Many cells in the body have a cell membrane whose inner and outer surfaces carry opposite charges, just like the plates of a parallel-plate capacitor. Suppose a typical cell membrane has a thickness of 8.5x109 m, and its inner and outer surfaces carry charge densities of -6.4×10-4 C/m² and +6.4×10-4 C/m², respectively. In addition, assume that the material in the cell membrane has a dielectric constant of 5.4. Part A Find the direction of the electric field within the cell membrane. into the cell O out of the cell Submit Part B E = Find the magnitude of the electric field within the cell membrane. Express your answer using two significant figures. —| ΑΣΦ Submit Part C Request Answer |AV| = Submit Request Answer Calculate the potential difference between the inner and outer walls of the membrane. Express your answer using two significant figures. 17 ΑΣΦ # ? Request Answer N/C ? mV
▼
Part D
Indicate which wall of the membrane has the higher potential.
inner wall
outer wall
Submit
Request Answer
Transcribed Image Text:▼ Part D Indicate which wall of the membrane has the higher potential. inner wall outer wall Submit Request Answer
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