Find the mean free path of an electron travelling at a speed of 18m/s in 2 seconds.(a) 9(b) 36(c) 0.11(d) 4.5This question was posed to me by my school teacher while I was bunking the class.This key question is from Dielectrics topic in portion Electric Fields in Material Space of Electromagnetic Theory

Find the mean free path of an electron travelling at a speed of 18m/s

1.	Find the mean free path of an electron travelling at a speed of 18m/s in 2 seconds.(a) 9(b) 36(c) 0.11(d) 4.5This question was posed to me by my school teacher while I was bunking the class.This key question is from Dielectrics topic in portion Electric Fields in Material Space of Electromagnetic Theory
Answer» Right option is (b) 36 Best explanation: The mean free path is defined as the average DISTANCE travelled by an electron before COLLISION TAKES place. It is given by, d = v X τc, where v is the velocity and τc is the collision time. Thus d = 18 x 2 = 36m.

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