Which of the following best describes the inner workings of conductors?
1.Electrons collide at random, experiencing a net change of position equal to zero, except when exposed to an external electric field.
2.The electrons start at one electrode and travel directly to the other electrode, stopping there.
3.The electrons' drift speed depends only on the material of the conductor and not on the voltage difference applied to it.
4.None of these choices is correct.
1
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If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 1000 V, what is the speed of the electrons?
A. 
B. 
C. 
D. 
E. 
An effective theory must:
A) have been proven. B) must have been around for centuries or longer. C) be continuously tested. D) include mathematical formulae.
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