Physics Question. Please Help. (Magnetic and Electric Fields)? - magnetic antenna physics
Antenna women. A satellite orbiting the earth in Ecuador at an altitude of 400 km, has an antenna that can be modeled as a 2.0-m-long stick. The antenna is perpendicular to the surface of the earth. In Ecuador, Earth's magnetic field is mainly horizontal and has a value of 8.0 * 10 ^ -5 T, ignoring any change in B with height.
Under the assumption that the circular orbit, determine the emf induced between the ends of the shell.
I am confused and really understand how to solve this problem. Please give me a solution, or touch me in the right direction.
Related equation:
EMF =- d / dt integral (B (r, t) * DA)
Saturday, February 13, 2010
Magnetic Antenna Physics Physics Question. Please Help. (Magnetic And Electric Fields)?
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Re = 6378000 m (radius of earth)
RO = 400,000 Re = 6,778,000 m (radius of the orbit)
400000m g times the
Earth's surface: g = 9.8 m / s ^ 2
g '= g * [Re 2/Ro ^ ^ 2] = 8.68 m / s ^ 2
Orbital speed:
vo = sqr (R * G ') = 7670 m / s
Dynamic EMF is given by:
DEMF = vXB.dL, but since
Magnetic field vector, velocity vector,
and form an orthogonal bar
System we have:
EMF = V * B * L
EMC = 7670 * (8.0 * 10 ^ -5) * 2 = 1.2272 V
induced in the groin.
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