The earth's magnetic field can affect the electron beam in an
oscilloscope or a television tube. An electron that has been
accelerated through a potential difference
of 1.46 104 V has a horizontal
initial velocity, directed north. Find the magnetic force on the
electron when the earth's field has a horizontal component of 0.250
G and dips 60.0° below the horizontal (values typical in
California).
magnitude
direction
---Select--- to the north, to the east, to the
south, to the west