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प्रश्न
Figure shows electric field lines in which an electric dipole P is placed as shown. Which of the following statements is correct?
पर्याय
The dipole will not experience any force.
The dipole will experience a force towards right.
The dipole will experience a force towards left.
The dipole will experience a force upwards.
उत्तर
The dipole will experience a force towards left.
Explanation:
If the lines of force are equidistant and parallel straight lines, the field is uniform and if either lines of force are not equidistant, or straight line or both, the field will be non-uniform. The number of electric field lines passing per unit area is proportional to the strength of the electric field. For example, see the following figures:
Hence in a given question, from the given pattern of electric field lines, it is clear that the strength of the electric field decreases from left to right. As a result force on charges also decreases from left to right.
Here in the given figure, the force on charge -q is greater than the force on charge +q in turn dipole will experience a force towards left.
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संबंधित प्रश्न
Why do the electrostatic field lines not form closed loops?
(a) Derive an expression for the electric field E due to a dipole of length '2a' at a point distant r from the centre of the dipole on the axial line.
(b) Draw a graph of E versus r for r >> a.
(c) If this dipole were kept in a uniform external electric field E0, diagrammatically represent the position of the dipole in stable and unstable equilibrium and write the expressions for the torque acting on the dipole in both the cases.
A point charge (+Q) is kept in the vicinity of an uncharged conducting plate. Sketch the electric field lines between the charge and the plate?
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Figure shows the electric field lines around three point charges A, B and C.
- Which charges are positive?
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