The earth has a magnetic field around it, which is generated by its molten core. this magnetic field exerts a force on compass dials, which are magnets, causing them to align with the earth's magnetic field. this force on compass dials is an example of a force that

acts at a distance

Explanation:

Compass dial is a magnetic needle which responds to the magnetic force due to Earth's magnetic field. Earth's magnetic field exists due to presence of magnetic material such as Iron and Nickel in the molten state in its outer core. The magnetic field surrounds the Earth and protects the Earth from harmful solar particles. Magnetic compass uses this magnetic field to show the directions. Magnetic force is a non-contact force and has infinite range. The field strength decreases with distance. The needle of compass aligns along with the magnetic axis of the Earth and points North. Thus, we can say that this force compass dial is an example of a force that acts at a distance.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.