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Two long straight current-carrying wires cross the x axis and carry currents I and 2I in the same direction (downward).at what value of x is the net magnetic field zero? The wires are separated by 4 meters.

electron entering two metal plate? Consider an electron entering a region between two charged metal plates where, aside from the electric field E, there is also a constant magnetic field B directed into the paper. V is the velocity of the electron (from left to right direction). a)Write an...