Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 3.00 m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.76 m away from a bulkhead.
(a) If the tension in the string is 2.30 N, what is the magnitude of q?
------------ μC
(b) What happens to the system as time passes? Explain.
Given,
l = 3 m ; q and 2q on A and B ; d = 1.76 m
a)T = 2.3 N
we know that
F = T = k q1q2/r^2
2.3 = 9 x 10^9 x q x 2q/3^2
q = sqrt (2.3 x 9/(9 x 10^9 x 2)) = 3.39 x 10^-5 C
Hence, q = 3.39 x 10^-5 C
b)An electric field will be induced because of the
charged balls on metal bulkheads, because of which the first ball
and the bulkhead and the second ball and bulkhead. In order to
compensate this, the tension will increase,
Two metal balls A and B of negligible radius are floating at rest on Space Station...
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