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Chapter 27: Q. 5 (page 762)

5. The electron drift speed is 2.0脳10-4m/s in a metal with a mean time between collisions of 5.0脳10-14s. What is the electric field strength?

Short Answer

Expert verified

The electric field strength is22.8mV/m.

Step by step solution

01

Given Information

Electron drift speed=2.0脳10-4m/s

Time between collisions=5.0脳10-14s

02

Explanation

The drift speed is given as a function of the electric field as

vd=e蟿mE,

The electric field as

E=mvde蟿.

Mass of the electron is m=9.1路10-31kgand the charge, the elementary charge, is m=9.1路10-31kgwe can find the value of the electric field strength to be

role="math" localid="1648877656088" E=9.1脳10-31kg脳2脳10-4m/s1.6脳10-19c脳5脳10-14s

E=22.75mV/m

03

Final Answer 

Hence, the electric field strength is22.8mV/m.

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