What is the Ratio of I1 to I2 for Zero Magnetic Field at Points A, B, and C?

In summary, the problem involves determining the value of the current ratio I1/I2 at which the magnetic field is zero at points A, B, and C. The problem provides a figure with two wires and asks for calculations assuming one wire is removed and then both wires are present. The total magnetic field is the sum of the individual contributions from each wire. The equation B = μI/2πr may be used to calculate the magnetic field for each wire.
  • #1
sphys4
21
0

Homework Statement


Because of the 2 wires in the figure,
For what value of the ratio I1/I2 is the magnetic field zero at the point A? point B? point C?

Homework Equations


http://tinypic.com/r/5otweg/7

The Attempt at a Solution


I honestly have no idea where to start with this problem, any help is appreciated!

I tried to upload the picture and it seems to not be working for me? My computer is really old so i don't know if its just not loading, if not here's the figure. http://tinypic.com/r/5otweg/7
 
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  • #2
Assuming the bottom wire didn't exist, do you know how to calculate the magnetic field (both magnitude and direction) due to the first wire at A, B, and C? How about if the bottom wire was there, but the top one wasn't? The total magnetic field is just the vector sum of the contributions due to each wire.
 
  • #3
ideasrule said:
Assuming the bottom wire didn't exist, do you know how to calculate the magnetic field (both magnitude and direction) due to the first wire at A, B, and C? How about if the bottom wire was there, but the top one wasn't? The total magnetic field is just the vector sum of the contributions due to each wire.

Well then i would have to use B = ul/2pir?
So do i just find that for each of the wires and then add them together?
 

FAQ: What is the Ratio of I1 to I2 for Zero Magnetic Field at Points A, B, and C?

What is a magnetic field?

A magnetic field is an area around a magnet or electric current where magnetic forces can be detected.

How is a magnetic field created by a wire?

A magnetic field is created by the flow of electric current through a wire. The strength of the magnetic field depends on the amount of current and the distance from the wire.

What is the direction of the magnetic field around a wire?

The direction of the magnetic field around a wire is determined by the right-hand rule. If you wrap your fingers around the wire in the direction of the current, your thumb will point in the direction of the magnetic field.

What is the relationship between the magnetic field and the distance from the wire?

The strength of the magnetic field decreases as the distance from the wire increases. This relationship follows an inverse square law, meaning that the strength of the magnetic field decreases exponentially as the distance increases.

How can the strength of the magnetic field be increased or decreased?

The strength of the magnetic field can be increased by increasing the current flowing through the wire or by decreasing the distance from the wire. It can be decreased by decreasing the current or increasing the distance from the wire.

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