Week 7 Rail Gun and Magnetic Moments Flashcards
1
Q
what is true of conventional current
A
moves in opposite direction to the electron
2
Q
what is the current velocity equation
A
I = nqAv
n is the number density of electrons
3
Q
what is the current magnetic field relation
A
current is always perpendicular to the magnetic field
4
Q
what is the simple and integral equations for the magnetic force on a current carrying wire
A
F = BIL F = ∫I x B dL
5
Q
what is the Ampere law for magnetostatics equation
A
∫B*dL = μI
6
Q
what is true of magnetic monopoles
A
there are no magnetic monopoles
7
Q
what is Gauss law for magnetism
A
∫B ds = 0
8
Q
what is the B field in a long solenoid
A
B = μnI
9
Q
what is the force per unit length between two current carrying wires
A
F/L = μIbIt/2πs
