Large electric fields in cell membranes cause ions to move through the cell wall, The field strength in a typical membrane is 1.0 × 107 N/C. What is the magnitude of the force on a calcium ion with charge +e?
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6 x 10^-19 C) and E is the electric field strength (1.0 x 10^7 N/C). Show more…
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Large electric fields in cell membranes cause ions to move through the cell wall. The field strength in a typical membrane is 1.0 x 10^7 N/C. What is the magnitude of the force on a calcium ion with charge +e? What is its acceleration? Is it possible for a particle with the same charge as calcium to have a different acceleration if placed at this location? What would change the acceleration: mass of the particle? diameter of the particle?
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The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. Assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.1 10-6 C/m2. (a) What is the magnitude of the electric field within the cell membrane? N/C (b) Find the magnitude of the electric force that would be exerted on a potassium ion (K+; charge = +e) placed inside the membrane. N
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Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. (Membranes are discussed in some detail in Nerve Conduction—Electrocardiograms.) What is the voltage across an 8.00 nm-thick membrane if the electric field strength across it is 5.50 MV/m? You may assume a uniform electric field.
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