Q.

A dipole consists of two particles one with charge +1μCand mass 1kg and the other with charge 1μC and mass 2kg separated by a distance of 3m. For small oscillations about its equilibrium position, the angular frequency, when placed in a uniform electric field of 20kV/m is _____×101rad/s

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Detailed Solution

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x=2×0+1×31+2=1cm

Moment of inertial of the system

About axis of rotation I=2×12+1×22

=6kgm2

p=3×106C

E=20×103V/m

ω=PEI=3×106×20×10+36=0.1 rad/s

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