electrostatics Flashcards
physics
why do electrostatic field lines not form closed loop?
because no electric field line exist inside the charged bodies
what would be the effect of force when a plastic sheet is inserted between the two identical balls having same positive charge q.
force is reduced when plastic sheet is inserted
F = Fâ/K
k is dielectric constant of material
why do electric field lines never cross each other
there would be two tangents drawn thus two electric field line which is not possible
why must electostatic field be always perpendicular at the surface ?
electric field inside a conductor is always zero. they exert lateral pressure which result in repulsion bet the charges. in order to stabilize electric field are normal to surface.
define dipole moment of an electric dipole
product of magnitude of charge and distance of the elctric dipole
vector quantity
what is direction in which a positive charge will move when applied force in electric field
in the direction of elctric field
the angle of dipole placed in stable and unstable equilibrium
stable=0
unstable=180
true or false
The mutual forces between two charges do not get affected by the presence of other charges.
True
superposition theorem
when radius is increased the electric flux due to a point charge enclosed by a spherical gaussian surface becomes?
no change
