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Grade: 12th pass

                        

Define drift velocityand derive an expression for it

2 years ago

Answers : (1)

Rup
14 Points
							The avg value of velocity of the electron through which it moves towards anode when external electric field is applied on the conductor.For finding it Vavg = 0Vd= a×(tr) a=accelerationtr= relaxation time F= -eE  E= applied fieldAlso F= maThen ma= -eEa= -(eE/m)trVd = a(tr)Vd=-(eE/m)trWhere -ve sign indicates that drift velocity is vector quantity and movement of electron is in opp direction of electric field
						
2 years ago
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