Two copper balls, each weighing 10g are kept in air 10 cm apart. If one electron from every 
atoms is transferred from one ball to the other, the coulomb force between them is (atomic weight of copper is 63.5)
A
N
B
N
C
N
D
N
Text Solution
Verified by ExpertsThe correct answer is:
C
Number of atoms in given mass 
= 9.48 × × 10 22 
Transfer of electron between balls 
= 9.48 × × 10
16
Hence magnitude of charge gained by each ball.
Q = 9.48 × × 10 16 × × 1.6 × × 10 –19 = 0.015 C
Force of attraction between the balls 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The law, governing the force between electric charges is known as
When the distance between the charged particles is halved, the force between them becomes
There are two charges +1 microcoulombs and +5 microcoulombs. The ratio of the forces acting on them…
A charge q 1 exerts some force on a second charge q 2 . If third charge q 3 is brought near, the fo…
and represents gravitational and electrostatic force respectively between electrons situated at a…
The ratio of the forces between two small spheres with constant charge in air in a medium of diel…