[amp_mcq option1=”chemical cells” option2=”voltage generators” option3=”solar cells” option4=”piezoeletric cells E. None of the above” correct=”option1″]
The correct answer is A. chemical cells.
A battery is a device composed of one or more electrochemical cells that convert chemical energy into electrical energy. The cells are arranged in a series, and each cell has a positive electrode, a negative electrode, and an electrolyte. The positive electrode is where oxidation occurs, and the negative electrode is where reduction occurs. The electrolyte is a substance that allows ions to flow between the electrodes.
When a battery is connected to an external circuit, the electrons flow from the negative electrode to the positive electrode. This flow of electrons creates an electric current. The amount of current that a battery can produce depends on the number of cells in the battery and the type of cells.
Batteries are used in a variety of applications, including portable electronics, power tools, and electric vehicles.
Option B, voltage generators, is incorrect because voltage generators produce electricity by converting mechanical energy into electrical energy. Option C, solar cells, is incorrect because solar cells produce electricity by converting sunlight into electrical energy. Option D, piezoeletric cells, is incorrect because piezoeletric cells produce electricity by converting mechanical stress into electrical energy.