an electron is moving parallel to a long. Straight current carrying wire. Does it experience any force
Answers
Explanation:
yes, the name of this force is ‘Lorentz force’
consequence of this force is that this electron cannot continue to travel parallel to the wire
suppose, an electron is moving parallel to a straight wire
suddenly, a current is switched on in this wire
this will produce a magnetic field on the electron
refer to any standard text like resnick and halliday and open that chapter on Ampere’s law
the direction of this field will be normal to the plane defined by the wire and the direction of motion of the electron
due to this magnetic field, the electron will experience Lorentz force - special case in which electric field is absent
this force is qvxB
the direction of this force is perpendicular to both v and B
this direction is radial - perpendicularly to the wire
whether towards or away from the wire - will depend on the directions of current and motion of the electron
the instantaneous position - its distance from the wire - will become a function of time
do not jump to conclude that the trajectory will be along a circular arc
because, the moment the electron shifts due to the radial Lorentz force, the magnetic field will have a different value at the new location
Answer:
yes.................