Creating a Uniform Magnetic Field
License: CC BY-NC 3.0
Located in Brookhaven National Laboratory in New York, this large Helmholtz coil is used to produce a uniform magnetic field.
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- A Helmholtz coil consists of a pair of identical circular magnetic coils that are separated by a distance equal to their radii. The magnetic field at a distance
xfrom the center of one coil is given as:
- One popular application for a Helmholtz coil is to create a region of space with a uniform magnetic field. By creating this region, scientists are able to use this method to study the magnetic properties of matter.
Using the information provided above, answer the following questions.
- If the current is increased in a Helmholtz coil, does the magnetic field change? How?
- Is the number of turns in the coils proportional or inversely proportional to the magnetic field?
- Show that at a point on the axis between the two coils, the magnetic field is given as: