Question

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?

Answer #1

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?

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 cylindrical wire of radius R=2.3cm carries a current of I=5A
uniform distributed across its cross-section. Find an expression
(i.e. a formula) for the magnitude of the magnetic field created by
this current as a function of radius both inside and outside the
wire. Use this expression to determine the magnitude of the
magnetic field at the surface of the wire (i.e. at r=R). Denote
this magnitude by Bo. Is there a radius bigger than R where the
magnitude of...

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.

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?

Uniform displacement-current density. The figure shows
a circular region of radius R = 3.70 cm in which a
displacement current is directed out of the page.The displacement
current has a uniform density of magnitude
Jd = 8.90 A/m2. What is the
magnitude of the magnetic field due to the displacement current at
radial distances (a) 1.40 cmand
(b) 4.50 cm?
(In nT)

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 thin cylindrical shell of radius R1=5.0cmR1=5.0cm is
surrounded by a second cylindrical shell of radius
R2=8.0cmR2=8.0cm, as in the figure (Figure 1). Both cylinders are
9.0 mm long and the inner one carries a total charge
Q1=−0.71μCQ1=−0.71μC and the outer one Q2=+1.56μCQ2=+1.56μC.
A) For points far from the ends of the cylinders, determine the
magnitude of the electric field at a radial distance r from the
central axis of 5.9 cm.
B) For points far from the ends of...

The current density inside a long, solid, cylindrical wire of
radius a = 3.6 mm is in the direction of the central axis
and its magnitude varies linearly with radial distance r
from the axis according to J =
J0r/a, where
J0 = 420 A/m2. Find the magnitude of
the magnetic field at a distance (a) r=0, (b) r = 2.0 mm
and (c) r=3.6 mm from the center.

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