12.50: A spatially uniform electric field is constrained with
/r0shc-ecw g 46mb;mw 6k7 orqin the circular region of
c7-6e rbom kmsg4h;0wcqr/w6 radius R as shown. The field is directed out of the plane of the page and its strength is decreasing uniformly with time. Which one of the following choices best represents the direction of the Lorentz force on the electron at the instant shown in the figure when the electron is moving up the plane of the page? Ignore gravity