Magnetic field of two parallel wires with opposite current

1. Two parallel wires, each carrying a current of I = 3.1 A, are shown below, where d = 5.2 cm. The current in wire 1 is in the opposite direction of wire 2. Find the direction and magnitude of the net magnetic field at points A, B, and C.

See attached file for full problem description.

I don't know how to do the problem - I have to convert Telsas to μT, and when I did that, using Ampere's law for long, straight wires, I got 11.36μT, into the page for both points A and C, but they were wrong. I don't understand what equation I am supposed to use. I really need to know how to find the direction of the magnetic field as well.

"Consider the four current-carrying wires described in the figure below. Each of these wires is long and straight, and carries the current I either into or out of the page, as shown."
What is the direction of the net magneticfield produced by these four wires at the center of the square?
Please see attached for diagram.

PART ONE:
The magnetic force between two long, straight, parallel conductors:
A) increases as the distance between the wires decreases
B) decreases as the length of the wires increases
C) increases as the current in either wire decreases
D) is independent of the length of the wires
PART TWO:
A nuclide of a tra

Problem 33.42
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at . A second, parallel wire carrying a 3.0 A current intersects the x-axis at .
Part A
At what point on the x-axis is the magneticfield zero if the twocurrents are in the same direction?
ANSWER: = Answer not d

A straight wire is carrying current along the x-axis in the +x direction. A second straight wire is carrying an equal current along the y-axis in the +y direction. Both of the wires are in the x-y plane, and all questions pertain only to the magneticfield at points in the x-y plane. Which of the following statements are true ab

Question: Two long, parallel conductors, separated by 10.0 cm, carry currents in the same direction. The first wire carries current I1 = 5.00 A and the second carries I2 = 8.00 A.
(a) What is the magnitude of the magneticfield created by I1 at the location of I2?
(b) What is the force per unit length exerted by I1 on I2?

The problem states:
Two long straight wires at separation d = 16.0 cm carry currents i1 = 3.61 mA and i2 = 3.00i1 out of the page.
(a) At what point on the x axis shown is the net magneticfield due to the currents equal to zero?
(b) If the twocurrents are doubled, is the point of zero magneticfield shifted toward wire

You want to create a uniform (constant and parallel) magneticfield in a small volume of space. The field should be 500 Gauss. You can get a current of 0.8 Amperes from a power source, and you must choose one of the following methods (only one method is correct):
a. A single long straight wire, at distance r from t

1) The figure (*see attachment) shows 11 paths through a region of uniform magneticfield. One path is a straight line; the rest are half circles. The table (*see attachment) gives the masses, charges and speeds of the 11 particles that take these paths through the field in the direction shown. Which path corresponds to which pa

Please see the attached file for the problem statement, and provide a fully worked-out solution.
In order to get an idea of the magnitude of magnetic forces, find the force per unit length between very long equal and opposite 10 ampere currents separated by 1 centimeter. Find the ratio of this to the weight per unit length of