If the distance between the two point charges become half, then force between them becomes
Correct answer: D. becomes 4 times
- A. double
- B. half
- C. remains the same
- D. becomes 4 times
Explanation
Electric force is given by F=Kq1q2/r2. Here q1 and q2 are the magnitudes of the point charges and r is the distance between them. When the distance is becomes half the new distance r' becomes r'=r/2. And the new force F' is F'= Kq1q2/r'2 = Kq1q2/(r/2)2 =4 Kq1q2/r2 =4F.F'=4F.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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