12.50: A spatially uniform ele
:6kx ec8tuij r;re 3c 457lbglctric field is constrained within the circular region of radius R as shown. The field is directed out of the plane of the page and its strength is decreasing uniforml
6g5 k7ejl 3u l8i4xc:;ecb rrty 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