Question

How do you find the magnetic force acting on a 3m-long
current-carrying section of wire of a given length if it sits in an
external magnetic field (current = .01 Amps, magnetic field =
.00002 teslas)? In what orientation(s) does it have to be placed to
feel this force? The moving charges on the wire
**also** produce a magnetic field of their own, how do
I calculate this magnetic field at a distance of 1 meter from the
wire? (if the current in the wire points upwards on a wire right in
front of you, what is the direction of the magnetic field if you
measure it near your eyes?)

For the first part would you use the equation, F=ILBsin(theta)?

Answer #1

13. A current carrying wire sits inside a magnetic field. The 5
meter wire carries a conventional current of 3 amps along the
+z-direction (toward the sky) and experiences a force of 10 newtons
along the y-direction (toward the South). What are the x-,y-, and
z-components of the magnetic field? Use a diagram to show your
answer.

A circular conductive loop of wire sits a centimeter away from a
straight, infinitely-long current-carrying wire. For each of the
following scenarios, predict the outcome and explain how you made
this prediction.
(a)The loop sits stationary near the wire and does not move. The
magnitude and direction of the current in the current-carrying wire
does not change. Is there an induced magnetic field in the
loop?
(b)The loop begins to move toward the infinitely-long
current-carryingwire. Is there an induced magnetic...

what statement is false dealing with magnetic field near a straight
long wire carrying constant current?
1.) magnetic field lines are a group of line perpendicular to
the current?
2. there is no magnetic field near the wire
3.) magnetic field lines are a group of lines parallel to the
current
4.) magentic field lines are a group of circles around the
current

How do you figure out the direction of the magnetic field around
a current carrying wire?

long straight wire carries 122 amps of current due wesr
through a uniform external magnetic field of strength 3.0 mT
directed 30 degrees west of north. a) How hard does the external
field push one meter of the wire, and in what direction? b) What
are the components of the magnetic field at a location 5.0 mm
directly beneath the wire? (Don’t forget about the external
field.)
the
direction of the wire is due west

1.
A straight current-carrying wire in a uniform magnetic field
experiences a magnetic force
a
only if the wire is moving.
b
only if the wire is parallel to the field.
c
parallel to the wire.
d
perpendicular to the wire.
2.
Magnetic field strength is greater
a
where the field lines are closer together.
b
where the field lines are further apart.
c
where the field lines are evenly spaced.
d
where the field lines cross.
3.
A moving,...

A wire carrying conventional current to the right experiences an
upward force from an external magnetic field. In what direction is
the magnetic field pointing?
a. downward b. out of the page c. in to the page d. upward.
A voltmeter can be created with a galvanometer by doing which of
the following? a. placing it in series with a resistor of very high
resistance b. placing it in parallel with a resistor of very high
resistance c. placing it...

Show that magnetic force, F = qvB = IlB for a current carrying
wire using the definition of current.
Thank you!

N loops of current carrying wire are coiled together to form a
magnetic dipole. The energy required to "twist" the dipole from its
lowest energy state (θ = 0o) to its highest energy state
( θ = 180o) (where θ is the angle between the dipole and
the external B-field) is approximately U = 27 ×10−3
Joules. If the current in the wire is 1.0 Amps, the area of one
loop is 1.0cm x 1.0cm, and the external B-field is...

Find the magnetic field of an infinitely long-current carrying
wire with current I = A cos(wt) in the +x direction with w > 0
but small and constant and A > 0 constant.

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