Assignment:
A natural satellite whose diameter is 10^4 meters moves at velocity of 1 km/s in the direction normal to the magnetic field of a planet in a region where B=10^-7 tesla. The satellite has appreciable conductivity.
A) The satellite moves in a perfect vacuum. What happens?
B) The ambient gas has a density of the order 10^10 particles per cubic meter, the particles being either electrons or singly charged ions. Each half of the satellite collects particles of the correct sign in sweeping thru space. Calculate the order of magnitude of the current.
C) Calculate the order of magnitude of the braking force.