Voltaic cells use chemical reactions to generate electrical energy, as well as the reverse process.
This type of cell is mainly composed of the anode (a metal electrode where oxidation occurs) and the cathode (a metal electrode where the reduction occurs). These electrodes are placed in two compartments separated by a porous plate or membrane and immersed in a medium containing ions.
This is how, when the chemical reaction of oxide-reduction occurs, electricity is generated.
Answer is C
electrical energy without an external power source
heat is ur answer
The fuel cell follows a chemical reaction to change over hydrogen-rich fuel into electricity.
An fuel cell is made out of an anode, a cathode, and an electrolyte film. It works by going hydrogen through the anode of a power device and oxygen through the cathode. At the anode site, the hydrogen particles are part into electrons and protons.
The protons go through the electrolyte film, while the electrons are constrained through a circuit, producing an electric flow and abundance heat. At the cathode, the protons, electrons, and oxygen consolidate to create water particles.