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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 times 10^7 N/C. What is the magnitude of the force on a calcium ion with charge +e? Express your answer using two significant figures.

Answer :

skyluke89

Answer:

[tex]1.6\cdot 10^{-12}N[/tex]

Explanation:

The electric force on a charged particle is given by

[tex]F=qE[/tex]

where

q is the charge of the particle

E is the strength of the electric field

In this problem, we have

[tex]E=1.0\cdot 10^7 N/C[/tex] is the electric field strength

[tex]q=+e=+1.6\cdot 10^{-19}C[/tex] is the charge of the calcium ion

Therefore, the electric force exerted on the calcium ion is

[tex]F=(1.6\cdot 10^{-19}C)(1.0\cdot 10^7 N/C)=1.6\cdot 10^{-12}N[/tex]

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