A block of mass 
and charge 
is attached to an unstretched spring of spring constant 
. When a horizontal electric field 
is switched ON, the block performs simple harmonic motion, whose amplitude of oscillation is
Text Solution
Verified by ExpertsNOT FOUND
This problem is based on the oscillations of a charged mass and spring system in an external electric field.
In an electric field 
, the block of charge 
experience a force 
. Due to this force, if the spring stretches by a distance 
, work done by the electric force is 
. This is stored in the spring as potential energy, given by 
.
Thus, the amplitude of oscillation,
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