Question

A flat circular coil having 15 turns, each of a radius of 18.0 cm, is in a uniform and steady 0.130-T magnetic field. The coil has a resistance of 8.00

a) Find the total magnetic flux through one turn of the coil when the field is parallel to the axis of the coil.

b) If the coil is rotated in 12.0 ms so its axis is perpendicular to the field, find the average induced voltage and the induced current in the coil.

Answer #1

A flat circular coil with 96 turns, a radius of 3.72 10-2 m, and
a resistance of 0.432 Ω is exposed to an external magnetic field
that is directed perpendicular to the plane of the coil. The
magnitude of the external magnetic field is changing at a rate of
ΔB/Δt = 0.837 T/s, thereby inducing a current in the coil. Find the
magnitude of the magnetic field at the center of the coil that is
produced by the induced current.

A circular loop of radius 14 cm carries a current of 15 A. A
flat coil of radius 1.2 cm, having 65 turns and a current of 1.1 A,
is concentric with the loop. The plane of the loop is perpendicular
to the plane of the coil. Assume the loop's magnetic field is
uniform across the coil. What is the magnitude of (a) the magnetic
field produced by the loop at its center and (b) the torque on the
coil...

20.1 A short circular coil with 15 turns has a radius of 7 cm. The
coil is placed is a 2.5 T magnetic field. Find the flux through the
coil for each case: a) the plane of the coil is perpendicular to
the magnetic field b) the angle between the plane of the coil and
the magnetic field is 35o.

In a physics laboratory experiment, a coil with 180 turns. Each
turn of the coil encloses an area of 12 cm2 . The coil is rotated
from a position where its plane is perpendicular to the earth's
magnetic field to one where its plane is parallel to the field. The
rotation takes 3.4×10−2 s . The earth's magnetic field
at the location of the laboratory is 6.0×10−5 T.
A) What is the magnetic flux through one turn of the coil...

A flat, circular coil has 40 turns of radius 3.6 cm. At t=0 an
external magnetic field perpendicular to the plane of the coil has
a value of 0.32 T and is decreasing linearly with time. At t = 0,
the induced emf is 65 mV. How long does it take for the field to
reach zero?

A circular coil of wire with 5 turns and a radius of 4.0 cm lies
flat on a table in a region where the magnetic field is 4.5 mT up.
The coil is flipped over in a time of 0.25 s. Is an emf induced in
the coil? If so, what is its average value?

A coil of 12 turns is in the shape of an ellipse having a major
axis of 20.2 cm and a minor axis of 9.82 cm. The coil rotates at 94
rpm in a region in which the Earth's magnetic field is 56.2 μT.
What is the maximum voltage induced in the coil if the axis of
rotation of the coil is along its major axis and this axis of
rotation is aligned perpendicular to the Earth's magnetic field?
What...

A flat coil of radius 4 cm has 30 turns and a resistance of
0.15 Ω, and is placed on a horizontal table.
Initially, a uniform magnetic field of 0.75 T pointing upward
(viewed from an observer above the table) passes through the coil.
In 0.25 s, the magnitude of the magnetic field is changed to 0.35 T
and the direction is completely reversed.
(a) Determine the direction of the induced current in the
coil. 2%
Answer: ______________
Explain in...

A circular coil of radius 4.0 cm, resistance 0.30 Ω, and 100
turns is placed in a uniform magnetic field at an angle of 30° with
the plane of the coil. The magnitude of the field changes with time
according to ?(?)=20?^(−0.3?) (in Tesla, t is time in seconds).
What is the value of the current induced in the coil at the time t
= 2.0 s?

A 149-turn circular coil of radius 2.67 cm is immersed in a
uniform magnetic field that is perpendicular to the plane of the
coil. During 0.153 s the magnetic field strength increases from
51.1 mT to 99.3 mT. Find the magnitude of the average EMF, in
millivolts, that is induced in the coil during this time
interval.

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