Table: Magnetic Fields Force on Moving Electric Charge The Lorentz Force Law sta

Question

Table: Magnetic Fields Force on Moving Electric Charge The Lorentz Force Law states that E Ex B Please use the directions as shown. 1. An electron is moving to the right (+i) in a uniform magnetic field that points out page (+k). What direction is the force? ev B VX B 2. A proton is moving to the right (+i) in a form magnetic field that points out of the page o o k). In what direction should you apply an electric field so as to make the net force zero? 10 O VR sin C Effects of Magnetic Fields 147 2014-15

Explanation / Answer

here,

3)

velocity , v = - 2 * 10^7 m/s i

B = 2 T * ( cos(60) i +sin(60) j)

B = ( i + 1.73 j) T

the net force , F = e * ( v X B)

F = 1.6 * 10^-19 * ( (-2 * 10^7 i) X ( i + 1.73 j)) N

F = - 5.54 * 10^-12 N k

the net force is 5.54 * 10^-12 N in -ve z direction

5)

direction of v is i

electric feild is due to j

magnetic feild is in x direction

as the angle between the magnetic feild and velocity is 0 degree

the magnetic force is zero

and the electric force is in y direction

so the net force is in y direction

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