Question
If one of the 13 q's is removed, What is the force on Q?
Answer
Similar to the problem 2.1(b), the answer is
If one of the 13 q's is removed, What is the force on Q?
Answer
Similar to the problem 2.1(b), the answer is
$F_Q = Qq/4\pi\epsilon_or^2$
Where r is the distance between charge Q and q.
Reasoning is easy. One missing charge breaks the symmetry of the problem. As a result of that charges sitting at corners other than the vacant site impose resultant coulomb force of amount $F_Q$ upon the test charge Q. We can easily prove it analytically (by using calculus).
Reasoning is easy. One missing charge breaks the symmetry of the problem. As a result of that charges sitting at corners other than the vacant site impose resultant coulomb force of amount $F_Q$ upon the test charge Q. We can easily prove it analytically (by using calculus).