Hot goIITian
Well i will tell u how to do part (B)
K.E.=mv2/2
V=
Now F=qvb
accln.=qvb/m
aplying s=ut+gt2/2
=1,6x10-19x1x10-7x1/ 2x9.1x10-31
by solving we get,
s=1.5cm
rate if correct .
Plz correct me if i am wrong.