Is the electric field positive or negative?
Electric field is a vector quantity whose direction is defined as the direction that a positive test charge would be pushed when placed in the field. Thus, the electric field direction about a positive source charge is always directed away from the positive source.
Why is electric field inside a sphere zero?
since all the charge is distributed on the surface of the spherical shell so according to Gauss law there will not be any electric flux inside the spherical shell, because the charge inclosed by the spherical shell is zero, so there will not be any electric field present inside the spherical shell.
Why electric field lines inside a conductor is zero?
Due to a large number of electrons, the force of repulsion acting in between them is also very high. Hence in order to minimize the repulsion between electrons, the electrons move to the surface of the conductor. Hence we can say that the net charge inside the conductor is zero.
What is the electric field outside the shell?
. We expect the excess electrons to mutually repel one another, and, thereby, become uniformly distributed over the surface of the shell. The electric field-lines produced outside such a charge distribution point towards the surface of the conductor, and end on the excess electrons.
How can you prove that the electric field is radial?
For one thing, the electric field must be radial: it either points outward from the center of the sphere, or inward. To prove this, suppose the electric field at some point outside the sphere wasn’t radial, but pointed off to the side.
Is there an electric field inside an insulator?
We define a conductor as a material in which charges are free to move over macroscopic distances—i.e., they can leave their nuclei and move around the material. An insulator is anything else. There can be no electric field inside a conductor.
Which of the following statement is correct the electric field at a point is?
Explanation: An electric field will be continuous because of any charge, if in the medium there is no other charge available. If there is a particular charge at a point under the consideration then, it will be discontinuous. Hence, the correct option is (b).