A fixed 17.1-cmcm-diameter wire coil is perpendicular to a
magnetic field 0.70 TT pointing up. In...
A fixed 17.1-cmcm-diameter wire coil is perpendicular to a
magnetic field 0.70 TT pointing up. In 0.16 ss , the field is
changed to 0.34 TT pointing down. What is the average induced emf
in the coil?
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.
Calculate the induced emf.
You hold a wire coil so that the plane of the coil is perpendicular to a magnetic field vector B. Vector Bis kept constant but the coil is rotated so that the magnetic field, vector B , is now in the plane of the coil. How will the magnetic flux through the coil change as the rotation occurs?
Check all that apply.
The flux is unchanged because the magnitude of vector B is constant.
The flux increases because the angle...
An 1200-turn coil of wire that is 2.4 cm in diameter is in a
magnetic field that drops from 0.12 T to 0 TT in 10 ms . The axis
of the coil is parallel to the field.
part A) What is the emf of the coil? Express your answer in
volts.
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 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 flat coil of wire is placed in a
uniform magnetic field that is in the y direction. (i) The
magnetic flux through the coil is maximum if the coil is (a) in the
xy plane(b) in either the xy or the yz plane (c) in the xz plane
(d) in any orientation, because it is constant. (ii) For
what orientation is the flux zero? Choose from the
same possibilities.
A magnetic field is perpendicular to the plane of a single-turn
circular coil. The magnitude of the field is changing, so that an
emf of 0.25 V and a current of 2.5 A are induced in the coil. The
wire is then re-formed into a single-turn square coil, which is
used in the same magnetic field (again perpendicular to the plane
of the coil and with a magnitude changing at the same rate). What
(a) emf and (b) current are...
A magnetic field is perpendicular to the plane of a single-turn
circular coil. The magnitude of the field is changing, so that an
emf of 0.81 V and a current of 3.8 A are induced in the coil. The
wire is then re-formed into a single-turn square coil, which is
used in the same magnetic field (again perpendicular to the plane
of the coil and with a magnitude changing at the same rate). What
(a) emf and (b) current are...
A coil of wire containing N turns is in an external magnetic
field that is at a LaTeX: 45^o45 o angle from the plane of the coil
and is steadily changing. Under these circumstances, an emf V is
induced in the coil. If both the rate of change of the magnetic
field and the number of turns in the coil are now doubled (but
nothing else changes), what will be the induced emf in the
coil?
A magnetic field of 0.080 TT is in the y-direction. The
velocity of wire segment SS has a magnitude of 78 m/sm/s and
components of 18 m/sm/s in the x-direction, 24 m/sm/s in
the y-direction, and 72 m/sm/s in the
z-direction. The segment has length 0.50 mm and is
parallel to the z-axis as it moves.
Part A
Find the motional emf induced between the ends of the
segment.
Express your answer with the appropriate units.
Part B
What would...