Question

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
points perpendicular to the plane of the loop. The field initially
has a magnitude of 0.500 T, and the magnitude increases linearly to
2.00 T in a time of 2.00 s. What is the induced current (in mA) in
the loop of wire over this time?

Answer #1

A circular loop of wire of area 0.25?2 lies in the x-y plane
with its center at the origin. A uniform magnetic field of 2.00 T
points in the positive z-direction. The loop begins to rotate at t
= 0s at the rate of 60 rpm.
a. What is the flux through the loop as a function of time?
b. What is the emf in the loop as a function of time?
c. If the loop has a resistance of...

2. A circular coil with 30 turns of wire has a diameter of 2.00
cm. The total resistance of the coil is 0.350 Ω. An applied uniform
magnetic field is directed upward, perpendicular to the plane of
the coil.
a) If the magnetic field changes linearly from 0.000 T to 0.800
T in 0.500 s, what is the induced emf in the coil while the field
is changing?
b) What is the magnitude and direction (CW or CCW when looked...

A single conducting loop of wire has an area of 3.6 X 10^-2 m^s
and a resistance of 160 ohms. Perpendicular to the plane of the
loop is a magnetic field of strength 1.5 T. At what range in T/s
must this field change if the induced current in the loop is to be
0.43 A?

Shrinking Loop. A circular loop of flexible iron wire has an
initial circumference of 168 cm , 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 1.00 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...

A circular coil of 312 winds of wire (radius = 7.0 cm,
resistance = 7.4 Ω) is placed in a uniform magnetic field that is
perpendicular to the plane of the loop. The magnitude of the field
changes with time according to ? = 90sin(7?) mT, where ? is
measured in seconds. Determine the magnitude of the current induced
in the loop at ?=?/7 s.

A wire loop of radius 10 cm has a resistance of 2.0
?. The loop is at right angles to a uniform magnetic field B. The
field strength is changing at a rate of ?B/?t = 0.10 T/s. What is
themagnitude of the induced current in the
loop?
A. 4.3
mA
B. 0.3 mA
C. 2.9 mA
D. 1.0 mA
E. 1.6 mA

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...

1.
A rectangular loop of wire with sides 0.142 and 0.528 m lies in
a plane perpendicular to a constant magnetic field (see part
a of the drawing). The magnetic field has a magnitude of
0.604 T and is directed parallel to the normal of the loop's
surface. In a time of 0.104 s, one-half of the loop is then folded
back onto the other half, as indicated in part b of the
drawing. Determine the magnitude of the average...

A two-turn circular wire loop of radius 0.737 m lies in a plane
perpendicular to a uniform magnetic field of magnitude 0.591 T. If
the entire wire is reshaped from a twoturn circle to a one-turn
circle in 0.116 s (while remaining in the same plane), what is the
magnitude of the average induced emf E in the wire during this
time? Use Faraday’s law in the form E = − ∆(N Φ) ∆t . Answer in
units of V.

A rectangular loop of wire measuring 0.5m by 0.5m is lying
flat on a table in a region of an external B-field (2.0 T) that
points directly into the table. You grab this loop of wire and pull
it sideways, completely moving it out of the region of the external
B-field in 1.5s. While you are pulling it out, an e.m.f. (and a
current) is induced in the loop of wire. What is the average
magnitude of the e.m.f. generated?...

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