Among the following, which is one way voltage can be produced?

Voltage can be produced through various means, and one of the key methods is through the application of chemical action. This process is primarily observed in electrochemical cells (like batteries), where chemical reactions occur between electrodes and an electrolyte, resulting in a potential difference or voltage. The movement of electrons during these reactions generates voltage, which can then be harnessed to do work, such as powering a device.

Chemical action is a fundamental principle behind many electrical devices. For example, in a standard alkaline battery, the reaction between the zinc and manganese dioxide generates electrical energy. Understanding this process helps technicians grasp how batteries are designed and how they function in systems they may work with.

The other options do not effectively describe methods of producing voltage. Mechanical movement can generate voltage, such as in generators, but it must also involve electromagnetic induction, not just movement alone. The attraction of neutron particles does not contribute to voltage generation as neutrons are neutral and do not produce electric charge or potential. Lastly, while physical contact of two metals can create a voltage due to contact potential, it is a limited scenario compared to chemical action, which actively involves energy conversion and has widespread applications in electrical technology.