Question:
find the force in free space between two like point charge of one coulomb each placed 1m apart
Answer:
According to couloumb law
F = k [q1q2] / r2 where k = 1/4π€0 (€0 = 8.854 * 10-12 C2N-1m-2 nis called permittivity of free space)
As the charges are like charges, they will repel each other.
Also, given q = 1couloumb and r=1 m
1/4π€0 = 9 * 109 N
F = 9×109 × (1.6×10−10)2 / 12
F=2.3×10−28N.
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