Two circular coils and magnetic fields

In summary, the conversation discusses the problem of determining whether the number of turns in a set of circular coils should be multiplied or divided by the radius. It also provides information about the number of turns and radius for two concentric coils and asks for help in determining the magnitude and direction of the outer current.
  • #1
lovelylm1980
18
0
I have been driving myself crazy trying to figure out this problem, for a while now. I just can't get the right answer. should the number of turns be multiplied or divided by the radius? Please help me out.


Two circular coils, concentric and lying in the same plane, produce magnetic fields such that the net magnetic field is zero at the center. The number of turns and radius are 5 and 10.00 cm for the inner coil, and 3 and 13.8 cm for the outer coil. What is the magnitude and direction (positive for counterclockwise, negative for clockwise) of the outer current if the inner current is 2.00 A and counterclockwise ?
 
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  • #2
Originally posted by lovelylm1980
should the number of turns be multiplied or divided by the radius?
Why would you think that you needed to do either one?
 

1. How do two circular coils interact with each other in a magnetic field?

The interaction between two circular coils in a magnetic field depends on the direction of the current flow in each coil. If the current flows in the same direction, the coils will attract each other. If the current flows in opposite directions, the coils will repel each other.

2. What affects the strength of the magnetic field in a circular coil?

The strength of the magnetic field in a circular coil is affected by the number of turns in the coil, the current flowing through the coil, and the radius of the coil. The more turns in the coil, the stronger the magnetic field. Increasing the current or the radius of the coil will also increase the strength of the magnetic field.

3. How does the distance between two circular coils affect their interaction?

The strength of the interaction between two circular coils decreases as the distance between them increases. This is because the magnetic field strength decreases with distance, and therefore the force between the two coils will also decrease.

4. Can a circular coil produce a magnetic field without current?

No, a circular coil cannot produce a magnetic field without current. The magnetic field is created by the flow of electric current through the coil. Without current, there is no magnetic field.

5. How can the direction of the magnetic field in a circular coil be determined?

The direction of the magnetic field in a circular coil can be determined using the right-hand rule. If you point your right thumb in the direction of the current flow, your fingers will curl in the direction of the magnetic field.

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