6. Satellite Attitude Control. Many satellites use coils called torquers to adju

Question

6. Satellite Attitude Control. Many satellites use coils called torquers to adjust their orientation. These devices interact with the Earth's magnetic field to create a torque on the satellite in the x, y or z-axis (directions). The major advantage of this attitude control system is that it used solar-power energy in lieu of the limited thruster feul. If a typical device has a magnetic dipole moment of 250Am, what is the maximum torque applied to a satellite when its torquer is turn on at an altitude where Earth's magnetic field is 3.0x105T?

Explanation / Answer

Maximum torque = magnetic moment x magnetic field
= 250x3.0x10^-5
= 7.5x10-3 N-m

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