Electrostatics Flashcards
Contrast conductors and insulators
Conductors are good for electric flow.
Insulators are poor for electric flow.
what is coulombs’ law?
f = k qq/ r^2.
k = 9.0 * 10^9
EQUAL AND OPPOSITE FORCES.
What does the graph of coulomb’s law look like?
the graph is exponentially decreases as the radius of the charges are separated.
What is the formula for the electric field lines?
E = F/q E = kq/ r^2
Electric line concepts:
Positive to negative lines.
Describe equipotential lines
A point anywhere along the same equipotential circle has the same force. The point has no work done.
What is electric potential energy
Work done. Work = Force ( distance)
Electric potential energy = charge ( V )
U = qV.
What is the unit for electric potential (voltage)
Joules per coulomb.
Work / Charge.
What is the formula for Voltage?
V = distance (electric field) v= kq /r
What is the force due to a magnetic field?
F = q Velocity ( magnetic field)
PERPENDICULAR
What is the right hand rule for magnetics?
Index finger is velocity
Middle finger is magnetic field
Force is thumb.
How do you relate magnetism and centripetal force?
Fc= mv^2 / r Fb= qvB.
qvB = mv^2 / r
What is the magnetic force through a current carrying wire?
Fb = LIB sin theta.
