Two equal negative charges are fixed at the points [0,a] and [0,a] on y-axis . A positive charge Q is released from rest at the points [2a,0] on the x-axis. The charge Q will
move to infinity
Move to origin and rest there
Undergo SHM about the origin
Execute oscillatory periodic motion but not SHM
A
move to infinity
B
Undergo SHM about the origin
C
Execute oscillatory periodic motion but not SHM
D
Move to origin and rest there
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Solution
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The net force is given as,
Fn=2Fcosθ
Fn=2×14πE×−q×Qa2+x2×x√a2+x2
Thus, the restoring force is not linear, So, the motion will not be simple harmonic motion but the motion will be oscillatory.
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