In: Physics

An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 1.60 T field with his fingers pointing in the direction of the field. His wedding ring has a diameter of 2.15 cm, and it takes 0.380 s to move it into the field.

(a) What average current is induced in the ring if its resistance is 0.0100 Ω? (Enter the magnitude in amperes.)

_________A

(b) What average power is dissipated (in W)?

_________W

(c) What average magnetic field is induced at the center of the ring? (Enter the magnitude in teslas.)

__________T

(d) What is the direction of this induced magnetic field relative to the MRI's field?

A. parallel

B. antiparallel

C. The magnitude is zero.

**Note** :**** An
**MRI** ( *Magnetic* *resonance*
*imaging*) scanner applies a very strong magnetic field
about 0.2 to 3T ,which aligns the proton spins .

It is basically a solution so attached handwritten content below

1 a) What is the approximate electric field strength and
magnetic field strength of the electromagnetic waves radiated by a
60-W lightbulb, as measured 5.5 m from the bulb? You can assume
that the bulb is 100% efficient in converting electrical energy to
light energy.
b.) Incandescent light bulbs are very inefficient. Find the
electric field strength and magnetic field strength assuming 5%
efficiency.
Please show all work, thank you!

This is MRI.
If a sample is put in a magnetic field with B0=1.5T (the most
common clinical field strength), and a z gradient with strength
Gz=3 Gauss/cm is applied (note conversion 10,000 Gauss/Tesla), what
is the Larmor frequency for the protons on the z=0 plane? If you
want to image a slice with thickness of 5mm centered at z=0, what
is the range of frequencies in the slice?

The solenoid has length L, diameter D, and n turns per unit length with each carrying current .It is usual to assume that thecomponent of the current along the z axisis negligible.(This may be assured by winding two layers of closely spaced wiresthat spiral in opposite directions.)From symmetry considerations it is possible to show that farfrom the ends of the solenoid, the magnetic field isaxial.Which figure shows the loop that the must beused as the Ampèrean loop for finding Bz(r) for...

The magnetic field in a certain region is 0.128-axis in the FigureA) What is the magnetic flux across the surface abcd in the figure?B) What is the magnetic flux across the surface befc?C) What is the magnetic flux across the surface aefd?D) What is the net flux through all five surfaces that enclose the shaded volume?

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 proton moves perpendicular to a uniform magnetic field B
with arrow at a speed of 2.20 107 m/s and experiences an
acceleration of 1.90 1013 m/s2 in the positive x-direction when its
velocity is in the positive z-direction. Determine the magnitude
and direction of the field.
magnitude_____T
direction : +x, -x, +y, -y, +z, -z

Find the radius of an electron's orbit when it moves
perpendicular to a magnetic field of 0.46 T with a speed of
6.29×105 m/s .
Express your answer using two significant figures.

explain how the magnetic field enables the three phenomena
below
magnetic field
1 low oxygen concentration
2 reducing impurity
3 maintaining stability of melt surface for dislocation free
growth

Design an experiment to determine the strength of the magnetic
field of Earth using the available equipment.
Available equipment: A large coil of wire (with stand
in the center), compass, ammeter, 10Ω and 50Ω resistors, power
supply, ruler.
A) Perform the experiment and record your measurement and
calculations in an appropriate format. Be explicit about what model
you're using to calculate the magnetic field. Vector diagrams may
assists you. Include important measurements. Determine the
magnitude of the Earth's magnetic field....

Design an experiment to determine the strength of the magnetic
field of Earth using the available equipment.
Available equipment: A large coil of wire (with stand in the
center), compass, ammeter, 10Ω and 50Ω resistors, power supply,
ruler.
A) Perform the experiment and record your measurement and
calculations in an appropriate format. Be explicit about what model
you're using to calculate the magnetic field. Vector diagrams may
assists you. Include important measurements. Determine the
magnitude of the Earth's magnetic field....

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