a beam of electrons moves from the back to the front of a room. The beam is deflected rightward, when facing the back of the room, by a magnetic field. What is the direction of the field causing the deflection and why?
2007-03-24 13:54:25 · 4 answers · asked by nybabyblu 6 in Science & Mathematics ➔ Physics
The Fleming hand rule only explain part of the process. When a electron moving towards a direction, it also generates its only magnetic field(Based on the right hand grip rule). The interaction between both field generates a force which causes the beam to bend towards right.
Hint: The motion of the electron is the current
2007-03-24 16:45:35 · answer #1 · answered by TMT 1 · 0⤊ 0⤋
The direction of the magnetic field is at right angles to the direction of the beam of electrons.This is called electro magnetic propagation.
2007-03-24 14:10:28 · answer #2 · answered by confused 3 · 0⤊ 0⤋
The direction of Lorentz magnetic force on a charge ' q 'moving in a magnetic field 'B' can be found using Flemming's left hand rule.
If central finger points in the direction of motion of POSITIVE charge, thumb is in direction of force i.e.deflection then index(first) finger points magnetic field.
If electron moves from back to front then it is equivalent to positive charge moving from front to back. Stretching the thumb of LEFT PALM from left to right and central finger (positive charge) away from self(observer), the first finger points VERTICALLY UPWARDS.
hence magnetic field points VERTICALLY UPWARDS
2007-03-24 15:15:05 · answer #3 · answered by ukmudgal 6 · 0⤊ 0⤋
Where is the room?
2007-03-24 13:59:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋