The magnetic field perpendicular to a circular wire loop 7.7
cmcm in diameter is changed from...
The magnetic field perpendicular to a circular wire loop 7.7
cmcm in diameter is changed from +0.44 TT to -0.27 TT in 150 msms ,
where + means the field points away from an observer and - toward
the observer.
A 20-cmcm-diameter circular loop of wire is placed in a 0.64-T
magnetic field.
a) When the plane of the loop is perpendicular to the field
lines, what is the magnetic flux through the loop?
Express your answer to two significant figures and include the
appropriate units.
b) The plane of the loop is rotated until it makes a
45 angle with the field lines. What is the angle in the
equation ΦB = BAcosθ for this situation?
Express your answer using...
A 9.0-cmcm -long wire is pulled along a U-shaped conducting rail
in a perpendicular magnetic field. The total resistance of the wire
and rail is 0.31 ΩΩ . Pulling the wire with a force of 1.1 NN
causes 3.5 WW of power to be dissipated in the circuit.
Part A
What is the speed of the wire when pulled with 1.1 N? Express
your answer in meters per second
Part B
What is the strength of the magnetic field? Express...
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.
The figure below displays a circular loop of nickel wire in a
uniform magnetic field pointing into the page. The radius of the
loop is 10.0 cm and the magnitude of the field is 0.160 T. You grab
points A and B and pull them in opposite
directions, stretching the loop until its area is nearly zero,
taking a time of 0.210 s to do so. What is the magnitude of the
average induced emf in the loop (in mV)...
Shrinking Loop. A circular loop of flexible
iron wire has an initial circumference of 168 cmcm , but its
circumference is decreasing at a constant rate of 10.0 cm/s due to
a tangential pull on the wire. The loop is in a constant uniform
magnetic field of magnitude 0.800 T , which is oriented
perpendicular to the plane of the loop. Assume that you are facing
the loop and that the magnetic field points into the loop.
Find the magnitude...
The loop is in a magnetic field 0.22 T whose direction is
perpendicular to the plane of the loop. At t = 0, the loop
has area A = 0.285 m2.Suppose the radius of the elastic
loop increases at a constant rate,
dr/dt = 3.45 cm/s .
A)
Determine the emf induced in the loop at t = 0 and at
t = 1.00 s .
Express your answer using two sifnificant figures
E(0) =
mV
B)
Express your answer...
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.14 mT. If the speed of the electron is 1.48 107 m/s, determine the following.
(a) the radius of the circular path
............ cm
(b) the time interval required to complete one revolution
............ s
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
A single loop of wire with an area of 0.0900m2 is in a uniform
magnetic field that has an
initial value of 3.8 T, is perpendicular to the plane of the loop,
and is decreasing at a
constant rate of 0.190 T/s. (a) What emf is induced in this loop? (b) If the loop has a resistance of 0.600O, find the current induced in the loop.
Question 1: A 13.7 cm diameter loop of wire is initially
oriented perpendicular to a 1.9 T magnetic field. The loop is
rotated so that its plane is parallel to the field direction in
0.33 s .
Part A: What is the average induced emf in the loop?
Question 2: A 7.4 cm diameter circular loop of wire is in a 0.71
T magnetic field. The loop is removed from the field in 0.28 s .
Assume that the loop...