electromagnetism Flashcards
1
Q
work done by magnetic field on a moving charge is
A
zero
2
Q
slip vs split rings are found in
A
Dc : split
Ac : slip
3
Q
what direction is the current in the north pole
A
Anti-clockwise
4
Q
formula for mutual conductance
A
M = N x flux / Current
5
Q
what does mutual inductance depend on
A
- square root of self inductances of coils
- inversely proportional to the distance between coils
- k (Coupling Factor)
6
Q
self inductance formula
A
L = uN^2A/L
7
Q
value of u0
A
4pi x 10^-7
8
Q
Magnetic field of current carrying wire
A
B = u I / 2pi r
9
Q
dimensions of self inductance
A
ML^2T^2A^-2
10
Q
energy stored in a magnetic field
A
U = 1/2 L I^2
11
Q
B formula for solenoid
A
B = u n I / L
