Comparing Magnetic Field Strengths with Vectors

In summary, the conversation is about determining the relationship between a pre-existing magnetic field and a field created by a current. The individual asking for help is confused about the significance of certain elements in the scenario and asks for clarification. They are instructed to sketch the pre-existing field and the field due to the current in order to determine where they reinforce and oppose. The right hand rule is also mentioned as a helpful tool.
  • #1
Cici2017

Homework Statement



Screen Shot 2017-07-22 at 9.04.03 am.png

Homework Equations

The Attempt at a Solution


Shouldn't they be the same? Does one being above the current and the other being below make any difference? I know when there is a higher density of magnetic field lines, the magnetic field strength is greater, but in this case, isn't it the same?
I'm so confused , please help~
 
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  • #2
I think you need to explain more about the scenario. What is the import of the (d) that is mentioned? What is the significance of the two truncated rectangles at wither side of the image? Is there a pre-existing magnetic field involved that you haven't mentioned? Please state the original question in its entirety.
 
  • #3
gneill said:
I think you need to explain more about the scenario. What is the import of the (d) that is mentioned? What is the significance of the two truncated rectangles at wither side of the image? Is there a pre-existing magnetic field involved that you haven't mentioned? Please state the original question in its entirety.
Oh Yes, Sorry~
 
  • #4
Screen Shot 2017-07-22 at 10.17.24 am.png
 
  • #5
Okay, so there is an existing field due to the magnets represented by the rectangles. Sketch in the pre-existing field and then the field due to the current. Where do they reinforce and where do they oppose? You'll probably want to use the right and rule for the magnetic field due to a current :wink:
 
  • #6
gneill said:
Okay, so there is an existing field due to the magnets represented by the rectangles. Sketch in the pre-existing field and then the field due to the current. Where do they reinforce and where do they oppose? You'll probably want to use the right and rule for the magnetic field due to a current :wink:
So the pre-existing magnetic field is from right to left (N to S) , and then the field due to the current is clockwise...how do I determine where they reinforce?
 
  • #7
Cici2017 said:
So the pre-existing magnetic field is from right to left (N to S) , and then the field due to the current is clockwise...how do I determine where they reinforce?
Sketch the vectors!
 

Related to Comparing Magnetic Field Strengths with Vectors

1. What is magnetic field strength?

Magnetic field strength is a measure of the intensity or force of a magnetic field at a specific point in space. It is represented by the symbol B and is measured in units of Tesla (T) or Gauss (G).

2. How is magnetic field strength different from magnetic field?

Magnetic field strength is a property of the magnetic field, while magnetic field refers to the region of space where a magnetic force can be detected. In other words, magnetic field strength describes the strength of the magnetic force at a specific point, while magnetic field describes the overall presence of a magnetic force.

3. What factors affect magnetic field strength?

The strength of a magnetic field can be affected by several factors, including the amount of current flowing through a wire, the distance from the magnetic source, and the type of material the magnetic field is passing through. In addition, the strength of a magnetic field decreases as you move further away from the source.

4. How is magnetic field strength measured?

Magnetic field strength is typically measured using a magnetometer, which is a device that can detect and measure the strength of a magnetic field. The unit of measurement for magnetic field strength, Tesla or Gauss, is often displayed on the magnetometer's screen or dial.

5. Why is magnetic field strength important?

Magnetic field strength is important in many scientific and technological applications. It plays a crucial role in the functioning of electric motors, generators, and other devices that use electromagnetic forces. It also plays a role in determining the behavior of charged particles in space, such as those in Earth's magnetic field.

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