Question

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?

Answer #1

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 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

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...

Consider two parallel wires placed a distance of 19.5 cm apart.
The current in the first wire is 10.5A and the current in the
second wire is 22.25A. If the currents are in opposite directions,
find the magnitude of the combined magnetic field at the midpoint
between the two wires. Calculate the answer in micro-tesla (µT) and
rounded to three significant figures

Two parallel long, straight wires are separated by 3.50 cm . One
of them carries a current of 2.00 A. The magnetic field at a point
halfway between the two wires has magnitude 6.00×10−5T .
a)What is the current in the second wire if its direction is the
same as in the first wire?
b)What is the current in the second wire if its direction is
opposite to that in the first wire?

Two parallel long, straight wires are separated by 3.00 cm. One
of them carries a current of 2.00 A. The magnetic field at a point
halfway between the two wires has magnitude 5.00×10^(−5)T. What is
the current in the second wire if its direction is the same as in
the first wire?
What is the current in the second wire if its direction is
opposite to that in the first wire?
Express your answer with the appropriate units.

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...

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

Two long, straight, parallel wires carry current. The first wire
carries I1 = 3 A to the right and the second carries I2 = 5 A to
the left. The force per length each wire exerts on the other is of
magnitude 5 × 10−6 N/m.
(a) Sketch the situation. On your sketch indicate the directions
of the magnetic fields produced by each wire and the direction of
the force exerted on each wire. Determine the distance between the
wires....

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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