Question

A flat, 118‑turn, current‑carrying loop is immersed in a uniform magnetic field. The area of the loop is 8.09 cm2 and the angle between its magnetic dipole moment and the field is 50.9∘. Find the strength of the magnetic field that causes a torque of 2.39×10−5 N⋅m to act on the loop when a current of 3.81 mA flows in it.

Answer #1

A flat,106 turn current‑carrying loop is immersed in a uniform
magnetic field. The area of the loop is 5.95×10−4 m2, and the angle
between its magnetic dipole moment and the field is 43.1∘. Find the
strength of the magnetic field that causes a torque of 1.53×10−5
N⋅m to act on the loop when a current of 0.00395 A flows in it.

To find the torque on a current carrying flat loop of wire in a
uniform magnetic field you need to multiply the current times the
cross product of the area vector of the loop with the magnetic
field vector -- I ( A x B ). How
would you determine the magnitude and direction of the area vector
A ? What would happen to the loop if it were
placed in the magnetic field with A perpendicular
to B and...

The magnetic torque exerted on a flat current carrying loop of
wire by a uniform magnetic field is: Select one: a. maximum when
the plane of the loop is perpendicular to the magnetic field b.
minimum when the plane of the loop is perpendicular to the magnetic
field c. independent of the orientation of the loop d. maximum when
the plane of the loop at an 45 to the magnetic field e. minimum
when the plane of the loop is...

A 20 turn loop is immersed in a magnetic field that’s spatially
uniform and varies in strength. Initially, the plane of the loop is
perpendicular to the magnetic field. At t= 0 s, the loop starts to
rotate so that 1.00 s later, the plane of the loop is parallel to
the magnetic field, thus rotating so that it completes one rotation
in 4.00 s. The magnetic field strength varies according to
?=1.20?^(−?1.90)T. The loop’s radius is 12.0 cm. What...

Given a 0.5 x 0.3 m rectangular current loop carrying 5 A of
current, A) what is the magnitude of the magnetic dipole moment of
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current running clockwise around the loop, what is the direction of
the magnetic diploe moment vector?
11. In the previous problem, if the magnetic field, B = 0.5 T is
oriented in the +y-direction (toward the top of this page), then...

A
square loop of side 4 cm, carrying a current of 5.2 A, is placed
inside of a uniform magnetic field of magnitude 1.55 T pointing in
the z direcrion. If the square loop makes an angle of 30 degrees
with the magnetic field, what is the magnetic moment of the
loop?
What is the magnitude of the torque on the loop?

A circular wire loop whose radius is 16.0 cm carries a current
of 2.58 A. It is placed so that the normal to its plane makes an
angle of 41.0° with a uniform magnetic field of 1.20 T. The initial
torque on the current loop will make the magnetic dipole moment
vector Will it?:
A. Try to align against the magnetic field
B. Try to align with the magnetic field.
C .There will be no torque on the loop
Then...

a) A current loop in a uniform magnetic field experiences
A net force and net torque
A net force
A net torque
b) A current loop in an external magnetic field will rotate so
that its own magnetic field is
perpendicular to the external field
parallel to the external field
anti-parallel to the external field
c) Is the simple motor motion similar to the simple pendulum
motion?
the loop rotates back and forth about an equilibrium
point.
No
Yes
d)...

A
single loop of aluminum wire, lying flat in a plane, has an area of
8.00 cm2 and a resistance of 2.50 Ω. A uniform magnetic field
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2.00 T in a time of 2.00 s. What is the induced current (in mA) in
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A circular ring with area 4.45 cm2 is carrying a current of 13.5
A. The ring, initially at rest, is immersed in a region of uniform
magnetic field given by B⃗ =(1.15×10−2T)(12i^+3j^−4k^). The ring is
positioned initially such that its magnetic moment orientation is
given by μ⃗ i=μ(−0.8i^+0.6j^), where μ is the (positive) magnitude
of the magnetic moment.
a) Determine the components of the initial magnetic torque of
the current carrying ring.
b) Find the change in potential energy from...

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