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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrostatics
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.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrostatics questions
The minimum charge on any object cannot be less than
An isolated charged point particle produces an electric field with magnitude E at a point 2m away. At a point 1m from the particle the magnitude of the field is:
The purpose of Millikan's oil drop experiment was to determine
Two charges are placed at a certain distance. If the magnitude of each charge is doubled, the force will become