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)
, the radius of the sheath is 
, and the current through the wire is 
. The permeability of free space is 
.
.
.
from the wire is 
. The permeability of free space is 
.
thick wire if a current of 
flows through it. The permeability of free space is 
.
between the rod and the conductor. The permeability of free space is 
.
.
.
flows through the first conductor and 
through the second. Calculate:
apart.
away from the first conductor and 
away from the second.
.
and has an opposite direction to the current through the small coil. The large coil is surrounded by 
threads and is 
long. The small coil is wound 
times and is 
long, and a current of 
flows through it. What is the magnetic field density inside the small coil?
to a homogeneous magnetic field of density 2.4 T. Calculate the magnetic force per decimeter length of the conductor if a current of 9 A flows through the conductor.
and its cross section area is 
.
. The proton rotates in a plane perpendicular to the lines of force. The mass of a proton is 
and the charge is 
.
enters a homogeneous magnetic field with a density of 
. The jet enters at an angle 
to the field force lines. Calculate the radius and pitch of the helical path along which the protons travel through the magnetic field. The mass of a proton is 
and the charge is 
.
and it must travel along the path shown by the continuous line in the figure below:
of the large curve is 
and the radius 
of the small curve is 
. There are two magnetic fields in space that are independent of each other and follow each other.
and 
for the electron to travel in the desired path?
?
, the mass of a proton and neutron is 
, and the mass of the cation is 
.
