An electric field of approximately +100 V/m is often observed nearthe surface of

Question

An electric field of approximately +100 V/m is often observed nearthe surface of the Earth. If this were the field over theentire surface of the Earth,
A) What would be the total electrical flux over the Earths'entire surface? B) What would be the magnitude and sign of the charge on theEarth? C) What would be the electrical potential at a point near theEarth's surface?
A) What would be the total electrical flux over the Earths'entire surface? B) What would be the magnitude and sign of the charge on theEarth? C) What would be the electrical potential at a point near theEarth's surface?

Explanation / Answer

= E A = 100 * 4 R2 = 400 *(6.37 * 10E6)2 = 5.10 * 10E16 N-m2 / C q = 0 = 8.85 * 10E-12 * 5.1 *10E16 = 4.51 * 10E5 C V = k q / r = 9 * 10E9 * 4.51 * 10E5 / 6.37 * 10E6 = 6.37 *10E8 J/C

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