Consider an electron near the Earth\'s equator. In which direction does it tend

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 1DirectionNorthSouthWestEastUpDownZero deflection (b) northward 2DirectionNorthSouthWestEastUpDownZero deflection (c) westward 3DirectionNorthSouthWestEastUpDownZero deflection (d) southeastward 4DirectionNorthSouthWestEastUpDownZero 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

so magnetic field is north

a) F = q v x B

so v into B or down into north gives east

but electron is negative charge so flip so west

b)north into north gives zero

c) west into north gives down but neg so flip so up

d) SE into N gives up but neg so flip so down

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