Identical charges separated by 1 cm experience a repulsion of 0.1 N. Find the charges.

Question

Question

science physics

Answer 1

Answer #1

Force = kq²/r²

r = 1 cm = 0.01 m

k = 8.9*10⁹ N m² / C^-2

0.1 = 8.9*10⁹ *q² / (0.01)²

=> q² = 0.1 * (0.01)*(0.01)/ 8.9*10⁹

Charge => q = 3.3 * 10^-3 C

Answer 2

Answer #2

F = kQq / d

Answer 3

Answer #3

given q1 = q2 = q=?

d = 0.01m....
F = 0.1N...
F = k*q1*q2/d^2...
F = k*q^2/d^2...

q^2 = F*d^2/k = 0.1*0.01^2/(9*10^9) = 0.112*10^-14

q = 0.334*10^-7 C = 0.0334 uC = 33.4 nC

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Answer 4

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