Two identical electrical point charges

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

21. Two identical electrical point charges `

Q

`, separated by a distance `

d

` produce an electrical force of `

F

` on one another. If the distance is decreased to a distance of `

0.40 d

`, what is the strength of the resulting force? (A) `

6.3 F

` (B) `

2.5 F

` (C) 0.40 F (D) `

0.16 F