A piece of tape is pulled from a spool and lowered toward a 120-mg scrap of paper. Only when the tape comes within 8.0 mm is the electric force magnitude great enough to overcome the gravitational force exerted by Earth on the scrap and lift it.

Upward

Explanation:

We are given that

Mass of scarp paper,

1mg=

Distance,d =8 mm=

Magnitude of electric force =

Where

Substitute the values

Gravitational force act in  downward direction.

The electric force acts in opposite direction and magnitude of electric force is equal to gravitational force.

Hence, the direction of electric force is upward.

c) up is the direction the magnetic force is acting on the charge.

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