A CHARGE q is istributed uniformly over a large plastic plate.The electric feidl at point P,which is near the centre is 10V/m.Now the plate is replaced bya copper one and all the conditions of the previous problem are exact. Find the electic field at point q
Ans 10V/m
My doubt-isnt copper a conductor of electricity so how can u have electric field in an interior point under electrostatics condition
A metallic particle having no net charge is placed near a fine metal plate containing postive charge.The electric force on the particle will be.Ans towards the plate
Its a simple case of electric induction.However since this is a metallic particle which means conducting the total electric field inside will be zero.which is only possible if the side of the particle near the plate has postive charge and the other negative chrge.So it should be away isnt it
30For the first question, the question intends to ask for the field intensity at a point (outside) near the centre of the plate.
2. Why do you feel that the side near the positive plate should be positively charged? And by the way, since this is a metallic particle, the charge distribution due to induction will not be uniform and the negative charge density will be concentrated in the regions nearer to the positive plate and hence the force will be attractive, i.e., directed towards the plate.
1if u draw a gaussian surface inside the particle u will find that the the charge shud be distributed on the surface of the particle....it does not matter whether the charge is positv or negatv....
here ofcourse the charge will be positv as well as negtv but as ashish has mentioned,it is not uniformly distributed........