Question

1. In Ampere’s law, when we integrate the magnetic field along a loop, which are summing?

a. the field components that are parallel to the
path elements, at every point along the loop

b. the field components that are perpendicular to the
path elements, at every point along the loop

c. the magnitudes of the field vectors at every point
along the loop

2. Which describes the magnetic field at a point inside a long wire that carries current uniformly across its circular cross-sectional area?

a. The field is directed radially inward.

b. The field is tangent to a circle through the point
and concentric with the wire.

c. The field is directed radially outward.

3. Which is true about a solenoid?

a. The internal magnetic field is approximately
uniform. The external magnetic field is weak.

b. The magnetic field is approximately uniform both
inside and outside the solenoid.

c. The internal magnetic field is weak. The external
magnetic field is approximately uniform.

4. In using Ampere’s law for a solenoid as in this section, which is true about the values of the integration parts?

a. The integrations parallel to the length of the
solenoid give a zero result; those perpendicular to the length give
a nonzero result.

b. The integrations parallel to the length of the
solenoid give a nonzero result; those perpendicular to the length
give a zero result.

c. The integrations parallel and perpendicular to the
length of the solenoid give a zero result.

d. The integrations parallel and perpendicular to the
length of the solenoid give a nonzero result.

5. Which describes the magnetic field along the central axis of a current loop?

a. The field is directed along the axis and away
from the loop on one side and toward the loop on the other
side.

b. The field is directed along the axis and toward the
loop on both sides of the loop.

c. The field is directed along the axis and away from
the loop on both sides of the loop.

d. The field is perpendicular to the axis.

Answer #1

**1. magnetic
field Bparall *dL = uo I**

**so**

**a. the field
components that are parallel to the path elements, at every point
along the loop**

**is
correct**

**-------------------------**

**2. For Circular
motion of Current**

**magnetic field
will be b. The field is tangent to a circle through the point and
concentric with the wire.**

**-------------**

**3. magneic
field Due to solonoid is B = uo n i**

**field wil be
inside the Solonoid**

**so answer
is**

**a. The internal
magnetic field is approximately uniform. The external magnetic
field is weak.**

**---------------**

**4. b. The
integrations parallel to the length of the solenoid give a nonzero
result; those perpendicular to the length give a zero
result.**

**------------------**

**5.**

**c. The field is
directed along the axis and away from the loop on both sides of the
loop.**

1. In Ampere’s law, when we integrate the magnetic field along a
loop, which are summing?
a. the field components that are parallel to the
path elements, at every point along the loop
b. the field components that are perpendicular to the
path elements, at every point along the loop
c. the magnitudes of the field vectors at every point
along the loop
2. Which describes the magnetic field at a point inside a long
wire that...

1. Which describes the vector calculation of the Biot-Savart
law?
a. The length element in the direction of the
current is crossed into a vector directed from that element toward
the point of measurement.
b. The length element in the direction of the current
is dotted into a vector directed from that element toward the point
of measurement.
c. The magnetic field vector is crossed into a vector
directed from a current-length element toward the point of...

A steady current, I, flows along a circular loop generating a
uniform magnetic field of 0.1T perpendicular to the plane of the
loop, and a magnetic flux through the loop of 10-4 weber. Within a
short time interval, the current and the magnetic flux both drop to
zero. Based on the given information, find:
(a) The initial current in the loop,
(b) the inductance of the loop, and
(c) the potential energy associated with the initial conditions
of steady current....

Which of the following statements correctly compare the ideal
parallel-plate capacitor to the ideal solenoid? Select all that
apply.
A) The direction of the uniform electric field in the capacitor
is parallel to the plates making up the capacitor, while the
direction of the uniform magnetic field is parallel to the axis of
the solenoid.
B) In the ideal capacitor changing the distance between the
plates does not affect the electric field. In the ideal solenoid
changing the radius of...

The strength of the magnetic field within a solenoid is B = 2.1
× 10-2 T (outside the solenoid B = 0). A smaller, single
loop is placed in the solenoid parallel to the plane of each loop
in the solenoid. The resistance of the solenoid is 5.9 W, the
resistance of the loop is 0.27 W, the diameter of the solenoid is
0.09 m, and the diameter of the loop is 0.05 m. An emf of 12 V is...

A magnetic field, strength 3T, has a direction out of the page.
A loop of wire sits in the field and on the plane of the page (area
vector of loop is out of page). The loop is much smaller than the
extent of the field. The magnetic field starts to slowly change at
a rate of -0.0001T/s. Looking down on the loop, which statement is
correct?
A. Magnetic flux out of page decreasing; anti-clockwise current
induced in loop
B....

1. A particle of positive charge q and mass m
enters parallel uniform electric and magnetic fields (of magnitudes
E and B, respectively) both directed in the +z direction with a
velocity v = v0i
perpendicular to both fields.
(a) What is the the particle’s initial acceleration? You can
give your answer as a vector in component form.
(b) What is the radius of the particle’s path (looking down the
z-axis) if the magnetic field is B =
Bk? Does...

An uniform magnetic field B is along z-axis. Find the
corresponding vector potential A which has
(a) only the x-component.
(b) only the y-component.
(c) both x- and y-components and write your result in terms of r
× B.
(d) Do your results in (a), (b) and (c) satisfy Coulomb/London
gauge ∇ · A=0?
The gauge (a) or (b) is called the Landau gauge and the gauge in
(c) is called symmetric gauge.

10. A spherical conductor of radius R = 1.5cm carries the charge of
45μ,
(a) What is the charge density (ρ) of the sphere?
(b) Calculate the electric field at a point r = 0.5cm from the
center of the sphere.
(c) What is the electric field on the surface of the sphere?
11. Two capacitors C1 and C2 are in series with a voltage V across
the series combination.
Show that the voltages V1 and V2 across C1 and...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 14 minutes ago

asked 28 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago