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in Physics by (95.2k points)

Two substances are identical except that the electron mean free time for substance A is twice the electron mean free time for substance B. If the same electric field exists in both substances the electron drift speed in A is: 

A. the same as in B 

B. twice that in B 

C. half that in B 

D. four times that in B 

E. one-fourth that in B

1 Answer

+1 vote
by (78.5k points)
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Best answer

B. twice that in B 

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