In 1785, who used the calibrated torsion balance to measure the force between electric charges?

Charles Augustin Coulomb

The correct answer is option 4. Charles Augustin Coulomb.

In 1785, the person who used the calibrated torsion balance to measure the force between electric charges was Charles Augustin Coulomb.

Charles Augustin Coulomb conducted experiments with a torsion balance to investigate the force between charged objects. His work led to the formulation of Coulomb's Law, which describes the electrostatic force between two charged particles.