What is the electric field created by a proton at a distance of 5 m away from it

Question

What is the electric field created by a proton at a distance of 5 m away from it? Note that the electric charge of a proton is e = 1.6 times 10^-19 C. What is the electric potential 1 cm from a proton? What is the electric potential difference between two points that are 1 cm and 2 cm from a proton? Sketch the electric field lines and equipotential lines for the following cases: (a) Positive charge, (b) Negative charge, (c) Positive and negative charge; (d) Positive charge and Negatively charged rectangular bar.

Explanation / Answer

3)

for the proton

electric field = K * Q/r^2

electric field = 9 *10^9 * 1.6 *10^-19/(5^2)

electric field = 5.76 *10^-11 N/C

4)

potential at 1 cm = k * Q/r

potential at 1 cm = 9 *10^9 * 1.6 *10^-19/.01

potential at 1 cm = 1.44 *10^-7 V

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for the potential difference the points

potential difference = k * Q * (1/r1 - 1/r2)

potential difference = 9 *10^9 * 1.6 *10^-19 * (1/.01 - 1/.02)

potential difference = 7.2 *10^-8 V

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please post the other question as a seperate post

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