Straight from Irodov: Electromagnetism

From the surface of a round wire of radius a carrying a direct current I an electron escapes with a velocity v_0 perpendicular to the surface. What will be the maximum distance of the electron from the axis of the wire before it turns back due to the action of the magnetic field generated by the current.

13 Answers

66
kaymant ·

What do you think?

66
kaymant ·

@iitimcomin
ur answer is not correct.

66
kaymant ·

Here is the situation:

3
iitimcomin ·

okie thanks sir .........

3
iitimcomin ·

ae2πmv/μ(q)I

3
iitimcomin ·

hope its right now .. sir !!!!!!! sorry for late reply ... i had to go to play !!!

3
iitimcomin ·

3
iitimcomin ·

sir / or any one else can u confirm???????

66
kaymant ·

well the answer is correct...interestingly, the coordinate system you have chosen is a left handed one! still you were saved because of the fact that a cross product is the same in a left or a right handed coordinate system. however be careful...

can anyone provide an alternate solution? (I knew that this straight forward approach would be the first one to come...)

3
iitimcomin ·

can u give me a hint ... sir .... on the alternate solution thing......

66
kaymant ·

Consider another reference frame moving parallel to the wire with a speed v0. What happens in this reference frame?

66
kaymant ·

??

1
Philip Calvert ·

someone try ?

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