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...

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,...

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

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

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!

1. A 0.874 m long section of cable carrying current to a car
starter motor makes an angle of 64.9º with the Earth’s
5.2×10−5 T field. What is the current when the wire
experiences a force of 6.26×10−3 N?
2. An electron moving at 4.55×103 m/s in a 1.34 T
magnetic field experiences a magnetic force of
1.77×10−16 N . What angle does the velocity of the
electron make with the magnetic field? Be sure to give an answer
between...

A very long straight current-carrying wire produces a magnetic
field of 20 mT at a distance 2 m from the wire. What is value of
the current that produces this filed at 2 m from the wire? To
measure a field of 5 mT due to current in this wire, at what
distance from the wire should you keep the measuring device to
measure the magnetic field? If you double the current what will be
the filed strengths at these...

To find the torque on a current carrying flat loop of wire in a
uniform magnetic field you need to multiply the current times the
cross product of the area vector of the loop with the magnetic
field vector -- I ( A x B ). How
would you determine the magnitude and direction of the area vector
A ? What would happen to the loop if it were
placed in the magnetic field with A perpendicular
to B and...

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