PhysicsHardHigh School (11–12)Electricity & Magnetism › ElectrostaticsNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabEach distribution is uniformly charged. A point's distance from it is doubled, staying in the region named. Match each distribution with the change in the field magnitude. List-I (Distribution) A. A long straight wire, point outside it B. A very large flat sheet, point beside it C. A thin spherical shell, point outside it D. A solid insulating sphere, point inside it List-II (Change in the field) I. It becomes one quarter II. It becomes half III. It becomes double IV. It does not change
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← Assertion (A): A closed surface surrounds some charges. When a charge outside the surface is moved to another place outside it, the net flux through the surface does not change, although the field at points of the surface does change.
Reason (R): The net flux through a closed surface depends only on the charge enclosed by it, while the field at any point is produced by all charges, inside and outside.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? →
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