Two Substances Are Identical Except That the Electron Mean Free

question 24

Multiple Choice

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

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