Question

In which of these examples does chemical energy change to electrical energy?

Answer 1

The answer is D,
digesting food is chemical to chemical
photosynthesis is light to chemical
and clearly respiration isn't the choice as well

Answer 2

Answer:

The correct answer is D: Using a battery.

Explanation:

This comes from not just understanding that the other options do not generate electrical energy as the exchange happens, but also from comprehending the principle behind the batteries and their purpose. A battery is a tool through which electrical power can be stored in the form of chemical energy, which will later be released back as electrical power given the correct circumnstances. This happens because in essence, electrical power cannot be caught and stored in a place; it must be transformed into a form that can be stored, and that is through chemicals. These chemicals, which are part of the battery, and which essentially are metals, form the cathode and the anode, also known as the positive and negative sides of a battery, and the electrolye, which mediates the exchange of electrons from both sides. When the right circumstance is given (flow of energy), the electrons at the anode are released and through an oxidation reaction with the ions of the electrolyte, these chemicals form a bridge towards the cathiode who takes up the electrons and thus release the electrical power that had been stored in the chemicals.