# Magnetic field at a point between two current carrying wires

• synergix
In summary, the conversation discusses finding the magnetic field at a point between two parallel wires with currents flowing in opposite directions. The equation for the magnetic field due to a current carrying wire is provided and the direction of the resulting field is also mentioned.
synergix

## Homework Statement

If two long parallel wires are separated by a distance of 1.00 m and there is a current of 5.00 A up in the wire on the left and a current of 10.0 A up in the wire on the right, find the:

a. magnetic field at a point 30.0 cm to the right of the left wire.

## Homework Equations

https://www.physicsforums.com/latex_images/19/1920784-0.png

## The Attempt at a Solution

Hello, well I think all I have to do is to calculate the two magnetic fields at this point, and then since they are going in opposite directions at this point find the difference. Is that correct?

Last edited by a moderator:
I think I will also need to indicate the direction of the net magnetic field at this point, right?

synergix said:
Hello, well I think all I have to do is to calculate the two magnetic fields at this point, and then since they are going in opposite directions at this point find the difference. Is that correct?

Sounds like a plan.

As to direction yes I suppose they will want it given as out of the paper or into the paper.

ok great just wanted to be certain. BTW I stole the URL for the equation of the magnetic field due to a current carrying wire from another post. Is there a page on physics forums I can goto to copy and paste the URL's for equations in the future? it makes everything much tidier.

nvm i found it

## 1. What is a magnetic field?

A magnetic field is a region in space where a magnetic force can be detected. It is created by moving electric charges and can exert a force on other moving electric charges.

## 2. How is a magnetic field created between two current carrying wires?

A magnetic field is created between two current carrying wires due to the flow of electric current in the wires. The moving electric charges create a circular magnetic field around each wire, and the interaction between the two fields creates a net magnetic field between the wires.

## 3. How is the strength of the magnetic field between two current carrying wires determined?

The strength of the magnetic field between two current carrying wires is determined by the distance between the wires, the amount of current flowing through the wires, and the permeability of the surrounding medium. The closer the wires are and the higher the current, the stronger the magnetic field will be.

## 4. What is the direction of the magnetic field between two current carrying wires?

The direction of the magnetic field between two current carrying wires is perpendicular to the plane formed by the two wires. This means that the magnetic field lines will be circular around each wire and will intersect at a right angle between the wires.

## 5. How can the magnetic field between two current carrying wires be calculated?

The magnetic field between two current carrying wires can be calculated using the Biot-Savart Law. This law states that the magnetic field at a point is directly proportional to the current, the distance from the wire, and the sine of the angle between the wire and the point.

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