An electron moving in the y direction at right angles to a magnetic field experiences a magnetic force in the x direction. The direction of the magnetic field is in the.
A. x direction
B. x direction
C. y direction
D. z direction
E. z direction

The direction of the magnetic field is in the  z-direction

Explanation:

Applying right hand rule, which states that when the thumb, index finger and the middle finger are held mutually at right angle to each other, with the index finger pointing in the direction of the moving charge (y- direction), the thumb pointing in the direction of the magnetic force (x-direction) pushing on the moving charge and then the middle finger pointing in the direction of the magnetic field (z-direction).