alleryStart learning →One coulomb is the charge that, placed 1 m from an equal charge in vacuum, experiences a force of
A9 x 10^-9 N
B1.0 x 10^0 N
C6.67 x 10^-11 N
D9 x 10^9 N
Answer & Solution
Correct answer: D. 9 x 10^9 N
Putting q1 = q2 = 1 C and r = 1 m in Coulomb's law gives F = 9 x 10^9 N, which defines the coulomb.
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