An electron moves along the z-axis with vz=4.1Ã107m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (xx, yy, zz) positions?

a. (1 cm , 0 cm, 0 cm)
b. (0 cm, 0 cm, 2 cm)

a

The value of magnetic field is

In the direction of the positive x - axis

b

The value of magnetic field is

In the direction of the positive z - axis

Explanation:

From the question we are told that

         The velocity of the electron is

Considering the first position

    The equation for the magnetic field is

 Now

  substituting values

Therefore

So   Substituting   for , for q

Considering the second  position

    Here

 So   Substituting   for , for q

which statement about this sum is true? −245+2.7