Question

23. Which statement is true below?

1. Any particle experiences magnetic field
2. Any charged particles experiences magnetic field
3. Any moving charged particle experiences magnetic field
4. Any moving charged particle not moving parallel to the magnetic field line experiences magnetic field

24. If an electron, in a magnetic field along – z axis, moves along +x axis, the direction of the magnetic field is

1. -y axis
2. +y axis
3. -x axis
4. +x axis

Answer 1

(1) Force on a charged particle is given by, Fq = q (u xo) where q = charge on the charged - particle ū - Velocity of the charged particle BP = magnetic field Strength. So, option CD) is correct, because the need to - be charged, it must be moving and should not be parallel to B' because if vois parallel to By Tix @ will become Zero. (2) Electron has charge =(-e) e = 1.681019 Velocity is along + axis so, lets say velocity = r î and magnetic field is along -z aris so lets say B = B(-E) so force on it s q cox B) = (-e) (r î x B(-²) eVB iz xis) = = the eVB (-j force will be of along So direction -Y-axis.