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Asked Nov 11, 2019
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6. Wil an electric dipole that is initially at rest but is free to move and rotate be
attracted to, repelled from, or unaffected by a point charge? Explain
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6. Wil an electric dipole that is initially at rest but is free to move and rotate be attracted to, repelled from, or unaffected by a point charge? Explain

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Expert Answer

Step 1

An electric dipole is a pair of identical charges having same magnitude but opposite sign which are separated by a small distance. The direction of an electric dipole moment is from the negative end to the positive end.

Step 2

Any point charge or a distribution of charges nearby its vicinity will experience the effect of two separate electric fields, one due to the positive charge and the other due to the negative charge of the electric dipole.

Conversely, if the dipole is in the vicinity of the point charge, the dipole may experience electrostatic force due to the field of the point charge. Here it is assumed that the magnitude of the electric field of the arbitrary point charge is not altered by the presence of the electric dipole.

 

Step 3

1)

If the point charge lies on the axis of the electric dipole.

In this case, there would be no net torque on the dipole as the line of action of the force due to the poi...

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Electric Charges and Fields

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