Question

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.

(b) What is the magnetic field (magnitude and direction) at a point halfway between the wires?

(c) What is the magnetic field (magnitude and direction) current 1 produces at current 2?

Answer #1

Two
straight wires are separated by a=1.90m. The upper wire has a
current I1= 2.10A and the lower carries I2=5.00A, both flowing into
the page.
a) Halfway between the wires at point A, what is the magnetic
field?
magnitude? uT
direction? in degrees counterclockwise from the +x axis

Two long, parallel conductors separated by 14.0 cm carry
currents in the same direction. The first wire carries a current
I1 = 5.50 A, and the second carries
I2 = 8.00 A. (Assume the conductors lie in the
plane of the page.)
(a) What is the magnitude of the magnetic field created by
I1 at the location of
I2?
T
(b) What is the force per unit length exerted by
I1 on I2?
magnitude
N/m
direction
---Select--- towards wire 1...

Two long wires are aligned parallel to each other and separated
by 20.0 cm. One wire carries a current, I1 and
the other carries a current I2 in the opposite
direction, where for the current magnitudes, I2
= 3 I1. The magnitude of the magnetic field at
a point midway between the wires is4.0 μT. Determine
I2.

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.

Two long wires are aligned parallel to each other and separated
by 20.0 cm. One wire carries a current, I1and
the other carries a current I2 in the opposite
direction, where for the current magnitudes, I2
= 3 I1. The magnitude of the magnetic field at
a point midway between the wires is 4.0 μT. Determine
I2.

Two long wires carry currents in the direction shown with I2
< I1. At which point will the net magnetic field be zero? Assume
no other sources of magnetic field.
both I1 and I2 to the left
Exactly halfway between the two wires.
Between the two wires but closer to the top wire.
Between the two wires but closer to the bottom wire.
Below both wires.

Consider two long straight
wires parallel to each other. The wire A on the left has a
current of I1= 3 A and is separated by 5 m from the wire
B on the right that carries I2= 2 A of current. The currents
are flowing in the same direction as in the figure.
a) Consider a point P that is 2 m to the right of wire B.
Determine the magnitude including unit and direction of
the magnetic field...

Two parallel long, straight wires are separated by 3.00 cmcm.
One of them carries a current of 2.00 AA. The magnetic field at a
point halfway between the two wires has magnitude
5.00×10−5T5.00×10−5T. 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.

Two long parallel wires are 4.0 cm apart. Each wire carries the
current 10 A in the same direction. Find the magnetic field halfway
between the wires.

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?

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