# Tagged With "theory"

Everything
Blog Post

#### A Quantitative Study of Helmholtz Coils

Rich ·
These coils come in pairs with the same number of windings of wire on each of the two coils. In "true Helmholtz" configuration: (1) the coils are wired in series with identical currents in the same direction in each coil, and (2) the coils are placed a distance apart that is equal to the radius of each coil. When in this configuration, they produce a very uniform magnetic field that is directed along their common central axis. One of the most common uses for such coils in physics education...
Comment

#### Re: A Quantitative Study of Helmholtz Coils

Clif ·
Rich- Awesome lab again! You probably noticed that there was change in the field readings along the y and z-axis even though the field should be really uniform in the x-axis between the coils. There are some hard iron and soft iron distortions of the magnetic field because of the coin cell battery, the mounting screws, and errors in the sensor component. We will eventually be able to calibrate the magnetic field readings and compensate for the distortions. Here's some calibration data that I...
Comment

#### Re: A Quantitative Study of Helmholtz Coils

Rich ·
Clif posted: Rich- Awesome lab again! You probably noticed that there was change in the field readings along the y and z-axis even though the field should be really uniform in the x-axis between the coils. There are some hard iron and soft iron distortions of the magnetic field because of the coin cell battery, the mounting screws, and errors in the sensor component. We will eventually be able to calibrate the magnetic field readings and compensate for the distortions. Here's some...
Blog Post

#### Magnetic Field on the Axis of a Current Loop

Rich ·
In this lesson students will find that a current-carrying loop can be regarded as a magnetic dipole, as it generates a magnetic field for points on its axis. The figure below shows a diagram and the equation for the magnetic field B. Derivation of this equation requries knowledge of the Biot-Savart Law, calculus and trigonometry. But in this lesson we are interested only in comparing experimental results from PocketLab's magnetometer to the theoretical equation in the figure below. More...
×
×
×
×