The electric field intensity which would be just sufficient to balance the weight of a particle of charge -10μC and mass 10 mg, is:
(Take g = 10 m/s²)
a. 10 N/C, in a upward direction
b. 10³ N/C, in a downward direction
c. 10 N/C, in a downward direction
d. 10⁴ N/C, in a upward direction