Find the magnetic field on the z axis at z +8.0 cm if (a) the
currents...
Find the magnetic field on the z axis at z +8.0 cm if (a) the
currents are both in the -x direction and (b) the current in the
wire at y -6.0 cm is in the -x direction and the current in the
wire at y +6.0 cm is in the +x direction.
The magnetic field inside a 4.0-cm-diameter superconducting
solenoid varies sinusoidally between 8.0 T and 12.0 T at a
frequency of 7.0Hz .What is the maximum electric field strength at
a point 2.0cm from the solenoid axis? What is the value of
B at the instant E reaches its maximum value?
Two long parallel wires 20 cm apart carry currents of 5.0 A and
8.0 A in opposite directions. At what point is the net magnetic
field due to the two of them zero?
12 cm from th3 8-A wire
53 cm from the 5-A wire
33 cm from the 8-A wire
There is no point where the net magnetic field is zero.
33 cm from the 5-A wire
1. Find the magnetic force vector on a point charge Q
located on the z-axis at z when a solid, finite
cylinder of uniform charge density rho and radius w is
centered on the z-axis from z1 to
z2. Answer in terms of epsilon,
2. Find the electric field vector a distance z in the
z-direction above the center of an infinite horizontal
plane of uniform surface charge density sigma. Answer in terms of
epsilon.
A) Given an electric field:
Ei = ˆx100e−γ z V/m
Find
the associated magnetic field. ( Note: Ei is vector, and ˆx = x
hat)
B) if this field is normally incident on a uniform lossy medium
with Er = 3.0, tan δ = 0.1, and μ = μ0
Initially propagating in air, find
both the reflection and transmission coefficients.
The magnetic flux through a 10.0-cm2cm2 loop is 8.0 T⋅cm2T⋅cm2,
and the magnetic field at the location of the loop is uniform.
Choose all correct answers.
Check all that apply.
A)If BB = 1.0 TT, then the angle between the B⃗ B→ field and
the normal to the loop's surface is greater than 0∘∘.
B)If the direction of B⃗ B→ field is parallel to the normal to
the loop's surface, then BB = 0.8 T.
C)The magnitude of the B⃗...
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?
At what distance on the axis of a current loop is the magnetic
field half the strength of the field at the center of the loop?
Give your answer as a multiple of R.
Express your answer in terms of R using two significant
figures.
The Hamiltonian of an electron in magnetic field is: Hˆ = −ωSˆ z
where Sˆ z is the operator of the z-component of spin. An electron
has been prepared in the state |S +x 〉 at t = 0, where |S +x 〉 is
the eigenstate of spin x-component with the eigenvalue of 1/2 h
(i) Evaluate the state of this electron at t = T .
(ii) Explain why this electron is said to be in a non-stationary
state....
A magnetic field is along the xy plane and the z plane is
perpendicular to the magnetic field. In which plane(s) is the
magnetic flux the greatest? Please explain.