Question

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 _______.

Answer 1

Answer: 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.

Answer 2

This force on compass dials is an example of a force that acts at a distance.