PhysicsHardHigh School (11–12)Electricity & Magnetism › ElectrostaticsNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabTwo statements about an electric dipole of moment in a uniform field of magnitude are given below. Statement I: The work done by an external torque in turning the dipole slowly from its stable equilibrium to its unstable equilibrium is . Statement II: In both equilibrium orientations the torque is zero, but at the unstable one a small turn produces a torque that turns the dipole further away.
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← The figure shows the field lines of two point charges, +2q and -q, at rest in vacuum. (i) Exactly half of the lines that leave +2q end on -q. (ii) At the midpoint of the line joining the charges, the field points towards -q. (iii) At some point between the two charges, the electric field is zero. (iv) No two of these field lines cross each other. (v) The electric potential is zero at one point between the two charges. How many of the statements above are correct?Assertion (A): At the same distance from the centre of a short electric dipole, the field on the axis is twice the field on the equatorial line, and the two fields point in opposite directions.
Reason (R): On the equatorial line, the components of the fields of the two charges along the line from the dipole centre to the point cancel, and the net field is parallel to the dipole moment. →
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