A-LevelPhysicsElectric fields9702/12 · Oct/Nov 2010 · Q281 Mark
The diagram shows a vertical uniform electric field in a vacuum. [Figure showing vertical electric field lines pointing downwards, and a horizontal beam of electrons flowing from left to right.] An electron gun injects a beam of electrons horizontally into the field. Which changes, if any, have occurred to the path and speed of the electrons by the time the beam leaves the field?
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Apath of electrons: deflected downwards, speed of electrons: increased
Bpath of electrons: deflected downwards, speed of electrons: unchanged
Cpath of electrons: deflected upwards, speed of electrons: increased
Dpath of electrons: deflected upwards, speed of electrons: unchanged
✓ Correct answer
A: path of electrons: deflected downwards, speed of electrons: increased
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