A fuel cell is defined as an electrochemical device that continuously converts the chemical energy of fuel into electricity and heat without combustion. Difference between Fuel Cell and Battery A fuel cell is similar to other electrical cells (battery) in respect that both have the positive and negative electrodes with an electrolyte between …
Following are the most common fuel cell types Alkaline Fuel Cell (AFC) Phosphoric Acid Fuel Cell (PAFC) Molten Carbonate Fuel Cells (MCFC) Solid Oxide Fuel Cells (SOFC) Proton/polymer Exchange Membrane Fuel Cells (PEMFC) Fuel Cell Types Important fuel cell types are described here except the alkaline fuel cell (AFC) as it is discussed earlier. Phosphoric …
Fuel cell technology is the new emerging technology. The development of this technology has started only few decades back and it is still under development for its commercial and economical use. In this article, I am going to explain the fuel cell working principle. Fuel Cell Working Principle A fuel cell is an electro-chemical device …
Wheatstone Bridge Working Principle Wheatstone devised a bridge-arrangement of resistances by which the resistance of a given conductor can be determined. This arrangement is called the ‘Wheatstone bridge‘. In the arrangement, four resistances are so connected as to form a parallelogram. In one diagonal of this parallelogram is connected a galvanometer and in …
Diamagnetic Materials These materials are feebly repelled by a magnet. When placed in a magnetizing field, they are feebly magnetized in a direction opposite to that of the field. Thus, the susceptibility of diamagnetic material is small and negative. Further, the flux density in a diamagnetic material placed in a magnetizing field is …
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A nickel-cadmium cell has two plates. The active material of the positive plate (anode) is Ni(OH)4 and the negative plate (cathode) is of cadmium (Cd) when fully charged. The electrolyte is a solution of potassium hydroxide (KOH) with a small addition of lithium hydrate which increases the capacity and life of the battery. The specific …
Hi friends, In this article, I am going to discuss the nickel-iron battery working principle and construction., and compare its features with a lead-acid battery. So keep reading. The Nickel-Iron alkaline cell was developed by an American scientist Thomson A. Edison in 1909. Therefore it is also known as Edison-cell. Nickel Iron Battery …
All new completed electrical installation should be tested before connection to the supply, to ensure that the installation is technically sound and free from any possible short circuits, etc. the main reasons, to test a new electrical installation or house wiring before it is switched on to the mains are as follows: To know the …
High resistivity materials are used for making resistance elements for heating devices, starters for electric motors, resistances used in precision measuring instruments, loading resistances and rheostats and filaments for incandescent lamps. High resistivity materials are used in all such applications where a large value of resistance is required. If low resistivity materials were used …
Hi friends, In this article, am discussing properties of superconductors and applications of superconductors. This article will provide you sufficient information about superconductors. The resistivity of most metals increases with increase in temperature and vice-versa. There are some metals and chemical compounds whose resistivity becomes zero when their temperature is brought near 0° …