In walking across a carpet, you acquire a net negative charge of 48 times 10^-6

Question

In walking across a carpet, you acquire a net negative charge of 48 times 10^-6 C How many excess electrons do you have? 3 times10^20 3 times 10^-25 3 times 10^14 1.44 times 10^23 Two fixed charges of +5nC and + 15nC are at a distance of 10mm from each other. The force on the + 5nC charge is +5nC +15nC 6.75 times 10^-3N away from+15nC 6.75 times 10^+3N towards+15nC 6.75 times 10^-22N away from +15nC 6.75 times 10^-13N away from +15nC Choose the incorrect choice: The electric field is zero inside a charged conductor Any excess charge on the isolated conductor resides entirely on the surface of the conductor. The electric field at the surface of a charged conductor is parallel to the surface. Excess charge on a conductor of irregular shape accumulates more a. the sharp points.

Explanation / Answer

here,

charge , Q = 48 * 10^-6 C

charge on electron , e = 1.6 * 10^-19 C

the number of excess electrons , n = Q/e

n = 48 * 10^-6 /( 1.6 * 10^-19)

n = 3 * 10^14 electrons

the number of excess electrons are c)3 * 10^14 electrons

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