| ASSERTION: Range of coulomb force is infinite. |
| REASON: Coulomb force acts between two charged particles. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
Coulomb's force or electric force given by coulomb's law is valid over nuclear distances \[\left( \cong \,{{10}^{-15}}\,m \right)\]as well as over very large distances. From Coulomb's law \[F=\frac{k\left| {{q}_{1}} \right|\,\,\left| {{q}_{2}} \right|}{{{r}^{2}}}\]. This generally holds only for charged objects whose sizes are much smaller than the distance between them.
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