Question

Consider two very long conducting parallel wires carry currents in opposite directions such that one is triple of the other. The distance between wires is 30 cm. The magnetic field at points on a line between the wires, and at a distance of 5 cm from the wire carrying the smaller current, is 2.5×10-5 T. a) Draw a diagram of the situation. Assume the wires are placed in the x-direction. Draw the direction of the magnetic field at points on that line. b) What are the currents in the wires? c) If an electron (e= 1.6×10-19 C , m=9.11×10-31 kg), at a given instant, passes at a point on that line and is moving at an angle of 45o to the direction of the magnetic field with a speed of 2.5×106 m/s, what would be its initial acceleration?

Answer #1

Two long straight wires are parallel and carry current in
opposite directions. The currents in the wires are 8.0 A for the
left wire upward and 12 A for the right wire downward. The wires
are separated by 0.40 cm.
A. The magnetic field due the left wire in mT (milli-tesla) at a
point midway between the wires is:
B. The direction of the magnetic field of the left wire carrying
8.0 A at a point midway between the wires...

The two wires shown in the figure carry currents of I = 4.08 A
in opposite directions and are separated by a distance of
d0 = 8.08 cm. Calculate the net magnetic field at a
point midway between the wires. Use the direction out of the page
as the positive direction and into the page as the negative
direction in your answer.Calculate the net magnetic field at point
P1 - that is 9.87 cm to the right of the wire...

The two wires shown in the figure carry currents of I = 4.08 A
in opposite directions and are separated by a distance of
d0 = 8.08 cm. Calculate the net magnetic field at a
point midway between the wires. Use the direction out of the page
as the positive direction and into the page as the negative
direction in your answer.Calculate the net magnetic field at point
P1 - that is 9.87 cm to the right of the wire...

Two long parallel wires which are 0.03 m apart carry equal
currents of 2.5 A. a) Calculate the net magnetic field at a point
midway between the two wires if their currents flow in the same
direction. Give magnitude and direction of Bnet. b) Calculate the
net magnetic field at a point midway between the two wires if the
currents flow in opposite direction. Give magnitude and direction
of Bnet. c) Calculate the magnitude of the magnetic force per meter...

Two long, parallel wires separated by 2.80 cm carry currents in
opposite directions. The current in one wire is 1.30 A, and the
current in the other is 3.35 A.
(a) Find the magnitude of the force per unit length that one
wire exerts on the other.
(b) Is the force attractive or repulsive?
attractiverepulsive

As shown in the figure below, two long parallel wires (1 and 2)
carry currents of I1 = 3.32 A and I2 = 4.50 A in the direction
indicated. Two parallel wires point into the page. They are a
distance d apart from each other, with the left wire labeled I_1 at
the origin and the right wire labeled I_2 a distance d along the
positive x-axis. There is a point labeled P directly above wire I_1
a distance d...

Two long straight wires are parallel and 8.4 cm apart. They are
to carry equal currents such that the magnetic field at a point
halfway between them has magnitude 240 µT. (a) Should the currents
be in the same or opposite directions? (b) How much current is
needed?

Two long parallel wires 10.0 cm apart carry currents of 3.0 A
and 2.9 A in the same direction. Is there any point between the two
wires where the magnetic field is zero?
a.
yes, 4.9 cm from the 3.0-A wire
b.
no.
c.
yes, 5.1 cm from the 2.9-A wire
d.
yes, midway between the wires
e.
yes, 5.1 cm from the 3.0-A wire

Consider two long and parallel current carrying wires that are a
distance 3.00 m away from each other, and carrying 72.0 mA and 33.0
mA currents.
Assume that the origin of the coordinate system is on the 33.0
mA wire and its positive x axis is directed towards the 72.0 mA
wire that is perpendicular to the wires.
a.) If these currents are in the opposite direction, find all
locations where the net magnetic field of the two wires is...

Two long, parallel transmission lines, 42.0 cm apart, carry
24.0-A and 75.0-A currents.
A.) Find all locations where the net magnetic field of the two
wires is zero if these currents are in the same direction. Give
answer in cm. (Note: Assume that the positive x axis is
directed from the 75.0-A wire to the 24.0-A wire perpendicular to
the wires, with the origin on the 75.0-A wire)
B.) Find all locations where the net magnetic field of the two...

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