Which of the following forces will change if acceleration due to gravity is changed?

• Viscous Force depends on the viscosity between the surfaces and relative speed. 
• The magnetic force depends on the magnetic field and the electrostatic force depends on the electric field.
• Therefore, viscous force, magnetic force and electrostatic force are independent of the acceleration due to gravity and will not change even if the acceleration due to gravity is changed.
• Buoyant Force depends on the size or volume of the body immersed in a fluid, the density of the fluid in which the body is immersed, and acceleration due to gravity at the place.

Hence, if the value of acceleration due to gravity is changed from one place to another, then the buoyant force will also change.