A loop of wire carries a current. The resulting magnetic field
__________.
points toward the loop at all points
points away from the loop at all points
is similar to that of a bar magnet in the plane of the
loop
is similar to that of a bar magnet perpendicular to the plane
of the loop
At what distance on the axis of a current loop is the magnetic
field half the strength of the field at the center of the loop?
Give your answer as a multiple of R.
Express your answer in terms of R using two significant
figures.
A square current loop 5.5 cm on each side carries a 470 mA current.
The loop is in a 0.70 T uniform magnetic field. The axis of the
loop, perpendicular to the plane of the loop, is 30 degrees away
from the field direction.
What is the magnitude of the torque on the current loop? 2 sig fig.
A single-turn square loop of wire, 2.00 cm on each edge, carries
a clockwise current of 0.160 A. The loop is inside a solenoid, with
the plane of the loop perpendicular to the magnetic field of the
solenoid. The solenoid has 30.0 turns/cm and carries a clockwise
current of 15.0 A.
(1) Find the force on each side of the loop.
magnitude:____________________uN
direction: a) the force is zero b) directed towards the center
c) directed away from the center
(2)...
A square loop of wire with sides of length 34 cm is in a uniform
magnetic field perpendicular to its area.
Part A
If the field's strength is initially 110 mT and it decays to
zero in 0.011 s , what is the magnitude of the average emf induced
in the loop?
Part B
What would be the average emf if the sides of the loop were only
17 cm ?
Express your answer using two significant figures.
Find the magnetic field on the z axis at z +8.0 cm if (a) the
currents are both in the -x direction and (b) the current in the
wire at y -6.0 cm is in the -x direction and the current in the
wire at y +6.0 cm is in the +x direction.
A circular conducting loop with radius 2.70 cm is placed in a
uniform magnetic field of 0.680 T with the plane of the loop
perpendicular to the magnetic field, as shown. The loop is rotated
180° about the axis in 0.242 s.
1.What is the direction of the induced current flow as the loop
begins to rotate?
2.What is the average induced emf in the loop during this
rotation?
A circular wire loop of radius 1.4 cm is placed in a magnetic
field of magnitude 2.3 T. If the magnetic field goes to zero in a
time of 5 s, what is the magnitude of the current induced in the
loop? The wire has a diameter of 2 mm, and the resistivity of
copper is 1.7 x 10-8 Ohm-m.
A square coil of wire of side 3.00 cm is placed in a uniform magnetic
field of magnitude 1.75 T
directed into the page as in the figure shown below. The coil has
38.0 turns and a resistance of
0.780 Ω. If the coil is rotated through an angle of
90.0° about the horizontal axis shown in 0.335 s, find the
following.
(a) the magnitude of the average emf induced in
the coil during this rotation
(b) the average current...
A wire 80 cm long carries 11 A of current. From this
wire, a loop of 90-turns is made and placed in a magnetic field of
6.50 Tat an angle of 35˚. In first experiment, a square loop is
formed and in the second experiment, a circular loop is formed with
same number of turns. Calculate the torque in each loop. Which loop
produces more torque-the circular loop or the square loop? What is
the reason for this change of...