MCAT - Physics - Electrostatics Flashcards

Terms Definitions
Electric Field
E=KQ/(r^2)
t or f
V=w/qo
t
t or f

e= -q
t
coulombs law is?
F=K (q1q2/r^2)
t/f
Fe=negative means particles attract eachother (vice versa)
t
electric field units?
newtons/coulomb or volts/meter
electrostatic force is
conservative or nonconservative?
conservative
si unit of charge is?
coulomb
volts/meter is the unit for?
electric field
Volt
the unit of electric potential= J/C=(NxM)/C
Dipole Moment
Vector quantity resulting from an electric dipole, equal to the product of the charge magnitude q and the distance separating the two charges d, often denoted by p.
Coulomb's Law
Law describing the electrostatic force that exists between two charges, q₁ and q₂, given as F(coul) = (kq₁q₂)/r²
where field lines are closer, the electric field is?
stronger
electric dipole in a uniform external electric field
the net force the dipole feels will be?
zero
what are the units for dipole moment?
c(m)
electric potential e U of q is?
U=W=qV
electic potential energy equals?
charge times electric potential
electr fields of separate charges add as ?
vectors
t/f
a charge experiences no change in potential energy when its final and intial positions are one the same equipotential
t
Electric Field Lines
Imaginary lines that show the direction in which a positive test charge is accelerated by the coulombic force due to the electric field of a source charge.
elect field of a ______________ points radially inwards
neg ch
the force that exists betw stat charges is called the?
electrostatic force
V electric potential has units of?
volts or j/c
the electric potential of a negat charge is a?
negative number
electric field of a ___________ points radially outward
positive charge
total electr potent at a point in space is the ____________ sum of electr potent due to each charge
scalar
Electric Fields
always present, it's the existence of a source charge that can be used to make Fe (conventionally always thought from a positive test charge)
electric potent e of a 2 charge system is negative when you have 2 ________ charges
opposite
the electr potential of a negativ charge is?
a negat number
t/f
conductors, but not insulators, become polarized
f
both conductors and insulators become polarized, but conductors are more pronounced)
electrostatics is the study of?
stationary or static charges and forces betw them
amount of work necessary to move a ch in an electr field dep only on?
potential difference
Superpositional of electric potential
since potential is a scalar, the superposition is additive
when V is due to one other charge Q U can be written as?
U=kqQ/r
the sign of U depends on?
the signs of q and V
Given an electric dipole, the electric potential is zero

A. only at the midpoint of the dipole axis.
B. anywhere on any perpendicular bisector of the dipole axis and at
infinity.
C. anywhere on the dipole axis.
D. only for points at infinity.
b. anywhere on any perpendicular bisector of the dipole axis and at infinity
If a charge of +2e and a charge of -3e are separated by a distance of 3 nm, what is the potential energy of the system?

what is e?
e=1.6 X 10^-19
How do you detect an electric field?
by the force it exerts on other electric charges
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