PhysicsAdvancedHigh School (11–12)Electricity & Magnetism › ElectrostaticsNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabAssertion (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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← Two statements about an electric dipole of moment p in a uniform field of magnitude E 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 2pE. 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.Five statements about electric charge are given below. Take e = 1.6 × 10⁻¹⁹ C. (i) A body can carry 4.8 × 10⁻¹⁹ C of charge. (ii) A charged rod attracts paper pieces because they gain a net opposite charge. (iii) In a medium of dielectric constant K, the force between charges is K times that in vacuum. (iv) The force between two point charges, found from Coulomb's law, is not changed by bringing a third charge near them. (v) Two neutral bodies rubbed together acquire equal and opposite charges. How many of the statements above are correct? →
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