Answer:Upward
Step-by-step explanation:
To hang the object in the halfway we need to direct the Electric field toward upward direction
Suppose object has mass m and charge q
If electric field is Pointing towards upward direction then the force experienced by charged particle is in the upward direction which will be balanced by weight of particle(pointing downward) such that
qE=mg
where q=charge of particle
E=Electric field
m=mass of particle
g=acceleration due to gravity