Question

A long cylindrical conductor of radius 90cm carries a current. The current density is not uniform over the cross section of the wire, instead is is given as J = 10r2. Find the magnetic field in terms of microT at a point 45cm. Note that you'll need to understand the previous question to answer this one.

Answer #1

A straight conductor of cylindrical cross section and of radius
a carries a current I, which is uniformly
distributed over the conductor cross section. Find the magnetic
flux density within and outside the conductor.

Long, straight, cylindrical conductor of outer radius 17 mm
carries a current 25 A. A uniformly distributed over its cross
section. What is the magnitude of the magnetic field at a distance
2mm in ISI units.

A long cylindrical wire (radius = 2.0 cm) carries a current of
49 A that is uniformly distributed over the cross-section of the
wire. What is the magnitude of the magnetic field at a point which
is 1.5 cm from the axis of the wire?

A long, hollow, cylindrical conductor (inner radius 8.0 mm,
outer radius 16.0 mm) carries a current of 16 A distributed
uniformly across its cross section. A long thin wire that is
coaxial with the cylinder carries a current of 16 A in the opposite
direction. What is the magnitude of the magnetic field at the
following distances from the central axis of the wire and cylinder?
(a) 4.0 mm. _______T (b) 12.0 mm. _______ T (c) 20.0 mm. _______
T

A long cylindrical wire (radius = 2.0 cm) carries a current of
49 A that is uniformly distributed over the cross-section of the
wire. What is the magnitude of the magnetic field at a point which
is 1.5 cm from the axis of the wire?
0.18 mT
0.44 mT
0.37 mT
0.49 mT

A Coaxial cable consists of a solid inner cylindrical conductor
of radius 2 mm and an outer cylindrical shell of inner radius 3 mm
and outer radius 3.5 mm. A current of 15 A flows down the inner
wire and an equal return current flows in the outer conductor. If
we assume that the currents are uniform over the cross section of
the conductors, then calculate the magnetic field at a radius of
2.5 mm (use ampere's law) [A] 2.4...

The figure shows a cross section across a long cylindrical
conductor of radius a = 1.99 cm carrying uniform current
24.7 A. What is the magnitude of the current's magnetic field at
radial distance (a) 0, (b) 1.43
cm, (c) 1.99 cm (wire's surface),
(d)3.13 cm?

The figure shows a cross section across a long cylindrical
conductor of radius a = 1.62 cm carrying uniform current 75.3 A.
What is the magnitude of the current's magnetic field at radial
distance (a) 0, (b) 0.797 cm, (c) 1.62 cm (wire's surface), (d)2.09
cm?

A long cylindrical wire made of a magnetic metal with relative
permeability has a uniform current density ??J flowing along its
length. An insulated wire runs along the axis of the cylinder and
carries a current I. Find the magnetic field, magnetic induction,
magnetization, and bound currents in the magnetic material.

A wire of radius R carries a non-uniform current described by
the current density J = A r^3 where r is the radial distance from
the center of the wire
1 write an expression for the total current that flows through
the wire in terms of the parameters A, R, and constants.
2) What is the magnetic field B in the region r < R. Be sure
to specify the direction of the field.
3) A positive charge is moving...

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