Can you provide any intuition for the neutrality of money in the
neoclassical model?
Do you think monetary neutrality is a good benchmark when
thinking about the real world?
You cannot make the earth's magnetic field disappear,
so while performing magnetic field mappings can the earth's field
impact my results? if any at all?
In Mapping magnetic fields where are they the strongest and
weakest?
A uniform magnetic field points upward, parallel to the page,
and has a magnitude of 7.85 mT. A negatively charged particle (q =
-3.32 µC, m = 2.05 pg) moves through this field with a speed of
67.3 km/s at a 42° with respect to the magnetic field, parallel to
the page as shown. What is the magnitude of the magnetic force on
this particle? 1.75 mN 1.30 mN 1.61 mN 1.17 mN
In this simulation, you can examine the magnetic field created
by the current in a solenoid, which is a cylindrical coil of wire.
Instead of using a spiral-shaped coil, the simulation approximates
the coil with a stack of seven single loops. The plane of each loop
is parallel to the x-z plane, with a radius of
either 60 cm or 25 cm, and the displayed field is in the
x-y plane.
The parallel-plate capacitor is the standard way to create...
Can a magnetic field sensor be made using semiconductor
material? If you say it can be done, draw the necessary schemes and
explain the theoretical calculations. Discuss which devices or
instruments will you use to determine physical quantities (indicate
which quantities are you going to find), and how you can determine
the magnetic field strength.
1.
-What physical phenomenon is MRI based on?
-What is the magnetic field gradient? Do we need this in
MRI's?
-What is the effect of head motion on an fMRI signal?
-Why would BOLD fMRI signal increase after neuronal
activation?
-What is the effect of neuronol activity in the fMRI voxel on
its T2*?
Helmholtz coils are a method developed to provide a uniform
magnetic field in a small region. They are constructed by placing
two identical wire loops parallel to each other, separated by a
distance equal to their radii, as shown in the Figure. Assume that
the two loops are also connected in parallel to a power supply, so
that they produce the same field.
(a) Find the length of a 28-gauge copper wire that will produce a
75 Ω coil.
m...
What equations can be obtained from a Magnetic field gradient vs
Magnetic force on dipole graph? What does the slope represent? This
is for the Magnetic force on a magnet experiment.
Can an electric or a magnetic field, each constant in space and
time, be used to accomplish the actions described below? Explain
your answers. Indicate if the answer is valid for any orientation
of the field(s). Must any other condition be satisfied?
(a) move a charged particle in a circle;
(b) exert a force on a piece of dielectric;
(c) increase the speed of a charged particle;
(d) accelerate a moving charged particle;
(e) exert a force on an electron...