Ques 1) If excess charge is placed on a spherical shell that is made up of conducting material, then the excess charge spreads uniformly over the external surface. Is this true in case if the shell is made up of NON CONDUCTING material (insulator) ? Is this still true regardless of the SHAPE of the object ? If I say, the object is made up of any other symmetrical shape ?
What happens if another external charge Q is placed near the object ? Will the external charge Q affects the distribution of the excess charges on the conductor ? (Provided the charge Q is much much greater than those excess charges)
Ques 2) Any charge given to conductor comes to it's surface. Should all the protons comes to the surface ? Should all the electrons comes to the surface ?
Ques 3) A spherical shell made of plastic, contains a charge Q distributed uniformly over it's surface. What is the electric field inside the shell? If the shell is hammered to deshape it without altering the charge, will the field inside be changed ? What happens if the shell made of the metal ?
49for no 1)
if the material was an insulator..
the charge would remain concentrated at the point where the charging has been done...the rest part will remain as it was before the charging was done!
if the material is non-conducting..then yes...the above fact is true for all shapes...
the charges appearing on the surface depend ONLY on the way the charging was done initially!!
But if the thing is a conductor... then there is no such thng as the charge must be uniformly distributed...
But the distribution will be according to the principle that potential of the surface of a conductor carrying static charges MUST be uniform other wise it would cause flow of charges which violates the basic ossumption of static electric charges!!
492) well the protons are (as we know) the bound portion of the atom which occupy fixed (lattice) positions in the conductor!! :)
the bound electrons are also fixed...now the free electrons in the conductor are free to move and are the ones which are responsible for charging of conductors!!! :)
493)
the charge distribution for the non-conductor remains fixed...so yes the electric field must change if we deform the body(obviously there would be no electric field if another symmetric body is made out o that symmetric body)
but in any case the field inside a charged and deformed conductor WILL BE 0!!
11dat's ok but the charge distribution will be affected by the shape of the conductor. The surface charge density (charge per unit area) varies over the the surface of any non spherical conductor. So, in case of non spherical object, the distribution will not remain uniform .
49well if the material is conductor the wat u said is true,..
if it is a non-conductor the charge distribution depends solely upon how the material was charged
!!
11ok thanx !!!! [1]
but in Ist ques, What happens if another external charge Q is placed near the object ? Will the external charge Q affects the distribution of the excess charges on the conductor ?
49yeah if that is a conductor...
a charge placed outside the conductor will change outer surface charge distribution....
if it is a non-conductor...then no change in the charge distribution...
P.S. : by non-conductor i meant something with dielectric constant ∞