Choose the CORRECT statement :-
(1) Electrons in a conductor are at rest in the absence
of a potential difference across it.
(2) Two identical metallic spheres of exactly equal ener
masses are taken. One is given a positive charge y
Q coulombs and the other an equal negative
charge. Their masses after charging are different.
(3) A line of force in an electric field is the path
traced by a unit positive charge, free to move in
that field.
(4) The energy of a charged solid conductor is stored
partly inside the conductor and partly outside
the conductor.
⭐ ACTUALLY THE ANSWER IS (2) BUT WHY (3) IS NOT CORRECT???⭐
Answers
Answer:
no 3
is only your correct answer
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Answer: (2) Two identical metallic spheres of exactly equal masses are taken.One receives a positive charge y Q coulomb and the other an equal negative charge. Their masses after charging are different.
Explanation:
(1) is incorrect, because electrons in a conductor are always in random motion and never are at rest.
(2) is correct, because for creating a positive charge q, q electrons needs to be removed from the sphere thus decreasing the mass of the sphere.
For creating -q charge on the sphere q electrons need to be added to the sphere thus increasing the mass of the sphere.
Therefore, the mass of both sphere would be different.
A metal ball charged + Q Coloumbs, in fact electrons charged −Q Coloumbs are emitted from it. This resulted in a decrease in sphere weight. The total number of circles is reduced by the total number of electrons emitted. − Q Coloumbs, fully charged electrons −Q Columns are injected into the area, thus increasing its size by weighing the total number of electrons placed inside it. Therefore their quantity after charging is different.
(3) is incorrect because a line of force is not the path traced by a unit positive charge free to move in the field.
(4) is incorrect because the energy stored on the outside of the conductor only. No energy is stored inside the conductor.
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