distance Which true charges repulsive and decreases with distance is is decrease

Question

distance Which true charges repulsive and decreases with distance is is decreases with the The force like is and is between like attractive and m. What h The free is distance of 2.0 e free herween like charges separated by a The of .20yC are 2 A charge .10ucind schierge of h N 045 of the electric field at a distance 3.0 mm from a "30 nC charge? of maritude ONUC d, 3 10 NC onc (assume the electric What is electric potential at dita ace of cm from a +30 charge? potential is zero at infinity) x 10' V e, 0.27 V A current flows field that is directed North what direction i e on the to the East in a magnetic South Vertically Up cannot Dow be determined

Explanation / Answer

1) force between like charegs are repulsive and decreases with increasing distance

2) f = kq1q2/r^2 = 9*10^9*10*20*10^-12/4 = 0.45 N

3) E = kq/r^2 = 9*10^9*3*10^-9/9 = 3 N/C

4) V = kq/r = 9*10^9*3*10^-9/0.03 = 900 V

5) f = l(i*B) = i*j = k

vertically up

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