Download current-carrying wire creates B fld

Determine the direction and magnitude of the magnetic field at “x” if the wire carries
current “i” and “x” is “r” units from the wire.
Solution:
x
x
r
i
B=
µoi
2!r
i
1.
Determine the direction and magnitude of the magnetic field at “p” if the left wire
carries current “i,” the right wire carries current “2i” the wires are “x/2” units apart
and “x” is “x” units from the wire.
•
2.
Determine the direction and magnitude of the magnetic
field at “x” if the left wire carries current “i,” the right
wire carries
current “2i” the wires are “x/2” units apart
2i
and “x” is “x” units from the wire.
i
2i
p
•
x/2
Where will the net magnetic field be zero?
B=
µ o ( 2i)
2!x
x
x
B=
(
µoi
2! x + x 2
Where will the net magnetic field be zero?
Between the two but farther from the 2i wire than the i wire.
3.
4.
)
Determine the net magnetic field at the origin
Determine the net magnetic field at the origin
B=
B=
µoi
2!a
µoi
2!a
B=
µoi
(
2! a 2
)
5.
6.
MASS SPECTROMETER
MASS SPECTROMETER
A charge “q” enters a magnetic field B with velocity “v.” What is the magnitude of the
magnetic force on the charge, and what path will the charge take? Additionally, what
does Newton’
What is the magnitude of the magnetic force on the charge, and what path will the
charge take? Additionally, what does Newton’s Second Law says about the situation?
!F
B
B
B
:
qvB sin " = m
v2
R
qvB sin 90 o = m
v
7.
v
2
v
R
8.