Consider an electron near the Earth\'s equator. In which direction does it tend
ID: 2253946 • Letter: C
Question
Consider an electron near the Earth's equator. In which direction does it tend to deflect if its velocity is directed in each of the following directions?
(a) downward DirectionNorthSouthWestEastUpDownZero deflection (b) northward DirectionNorthSouthWestEastUpDownZero deflection (c) westward DirectionNorthSouthWestEastUpDownZero deflection (d) southeastward DirectionNorthSouthWestEastUpDownZero deflection Consider an electron near the Earth's equator. In which direction does it tend to deflect if its velocity is directed in each of the following directions?Explanation / Answer
First know that the direction of earth's magnetic field is from south to north..However, at the equator, the magnetic field lines become horizontal in the direction from east to west.
(a.) downward electron...i.e. going to south , apply q(v x B) to find direction,...q=-e , v=South , B = west...
So, you get the resultant direction as "UP"
(b.)northward electron...i.e. going to north, apply q(v x B) to find direction,...q=-e , v=north, B = west...
So, you get the resultant direction as "DOWN"
(c.)westward electron...i.e. going to north, apply q(v x B) to find direction,...q=-e , v=west, B = west...
So, there will be "NO DEFLECTION"
(d.) ) south eastward electron...i.e. going to north, apply q(v x B) to find direction,...q=-e , v=south east, B = west...
So, there will be "UP"