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Electrostatic force on a charged parricl...

Electrostatic force on a charged parricle is given by `overset(.)F=qvec(E)`. If q is positive `vec(F)uarrrArrvec(E)uarr` and if q negative `vec(F) uarr rArr vec(E ) darr`
Question : In the figure `m_(A) = m_(B) =1kg`. Block A is neutral while `q_(B) = - 1C`. Sizes of A and B are negligible. B is relased from rest at a distance 1.8 m from A. Initially spring is neither compressed nor elongated

The amplitude of oscillation of the combined mass will be :

A

6 m/s

B

3 m/s

C

9 m/s

D

12 m/s

Text Solution

Verified by Experts

The correct Answer is:
B
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In the figure m_(A) = m_(B) = 1 kg . Block A is neutral while q_(B) = -1C . Sizes of A and B are negligible. B is released from rest at a distance 1.8 m fromt A. Initially spring is neither compressed nor elongated. The amplitude of oscillation of the combined mass will be

In the figure m_(A) = m_(B) = 1 kg . Block A is neutral while q_(B) = -1C . Sizes of A and B are negligible. B is released from rest at a distance 1.8 m fromt A. Initially spring is neither compressed nor elongated. Equilibrium position of the combined mass is at x = ........m.

Knowledge Check

  • A charged particle with charge q enters a region of constant, uniform and mututally orthogonal fields vec(E) and vec(B) with a velocity vec(v) perpendicular to both vec(E) and vec(B) , and comes out without any change in magnitude or direction of vec(v) . Then

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    B
    `vecv=vecE xx vecB//B^2`
    C
    `vecv=vecB xx vecE//B^2`
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    `vecv=vecE xx vecB//E^2`

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