E field Flashcards
define electric field strength
the force experienced per unit positive charge
is electric field a scalar quantity
no
derive work done by the field
E=F/Q, E=V/d, Fd=W
what is E0
permittivity of free space 8.85*10^-12
work done in moving an electron from more negative end to the more positive end in the electric field is
negative
work done in moving an electron from more positive end to the more negative end in the electric field is
positive
work done in moving a proton from more negative end to the more positive end in the electric field is
positive
work done in moving a proton from more positive end to the more negative end in the electric field is
negative
define electric potential energy
work done in moving a charge from infinity to a point in the field
define electric potential
work done per unit charge in bringing a positive test charge from infinity to a given point in the field, zero potential at infinity
how is the PE changed as a positive test charge moving towards a large positive point charge
positive PE
how is the PE changed as a positive test charge moving towards a large negative point charge
negative PE
for positive test and point charge in the field, compare the electric potential at a given point and at infinity
Positive potential
for positive test charge and negative point charge in the field, compare the electric potential at a given point and at infinity
negative potential
define electric potential difference
the difference in work done to move a unit charge between two points
formula of electric potential energy in an uniform field
Ep=Eq*change in distance
how does electron move in electric field(perpendicularly to the field line )
parabolic shape, use of SUVAT
