Determining The Measurement Of The Local Magnetic Field

However, there are natural magnetic mineral deposits that interfere with compasses (Patil 2015). Compasses point to north because of the magnetic poles and if there are magnetic mineral deposits around you, the compass will point to the magnetic interference instead of the north. For example, in the Gobi desert there are natural magnetic mineral deposits which prevent the compass to point to the true north (Patil 2015). There are also places in the North and South poles where this haywire compass activity occurs (Patil, 2014). There is plenty of proven information on why this happens in the Bermuda

The current has a positive charge in one side of the coil and it transforms to negative when it gets to the other side of the coil. This charge controls the magnetic field, making the like charges repeal and the opposite charges attract.

13. Use the ruler to measure the length, width, and height of the magnet in centimeters. Record the measurements in Data Table 5.

The data amassed by the scientist revealed that the Mid- Atlantic Ridge and the East Pacific Rise and countless other locations on the ocean floors display the same arrangements of varying magnetic stripes. As new volcanic rock erupts through fractures on the floor of the ocean, a progression identified as seafloor spreading, which causes the seafloor to widen (Trefil & Hazen, 2010). This new rock will be pushed aside as the continents are moved apart and as more magma comes up to take its place. The iron ore in this latest rock will steer to the position of the magnetic north pole once they get through to the top. Every occasion, that the planet’s magnetic field moves in the opposing direction, the dipole course of the planets magnetic field adjust and becomes encased in the recently constructed rock (Trefil & Hazen, 2010).

5. At a coil current of 3 A, what is the magnetic field produced at the center of the Helmoltz coils in gauss? About what is the magnitude of the Earth’s field in gauss?

8.20 Does it appear in figure 8.29 that the reversals in Earth’s magnetic field are separated in equal periods of time, or are they random in their occurrences?

3. Create various secondary coils using distinctive lengths, diameters, thickness of wire (gauge), and amount of windings/turns.

The receiving coil was connected in parallel to the coupling capacitors of 100nF. These capacitors helps the coils to improve coupling co-efficient.

• Briefly describe the current theories regarding marine animals using the Earth’s magnetic field for navigation and list at least one animal that theoretically uses this method. Do you feel the theories regarding marine animals’ use of the Earth’s magnetic field for navigation are accurate? Why do you feel this way? How could this ability benefit humans?

where La is the inductance of the armature coil. Finally, the back emf can be written as

The gradient coils generate a secondary magnetic field to enable images directionally in the z, x, y planes. These are

Magnetic Compass, one key fact about this invention is that this was used by traders so they wouldn’t get lost in places like the silk road.

Without the compass, our technological state would still be in the dark ages. The compass was the greatest invention in history because it increased wealth and it gave a way for information to be spread around the world. Though many people argue against it, the benefits of it outweigh any other invention. To begin, the compass allowed for people expand and grow their fortune.

Compass is an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north. The compass become very important for navigation. Before compass navigation they navigated with the stars. However, this mean of navigate wouldn’t last long because the stars aren’t out during day and when there is storm the stars aren’t visible either. The weather is unpredictable and this could occur for many days and night. The compass help navigate through storm and when star wasn’t visible, making traveling across the sea easier.

The strength of magnetic fields is measured in units of Teslas (T). One tesla is actually a relatively strong field - the earth's magnetic field is of the order of 0.0001 T.