We use radio, television, refrigerators tube light etc in our home appliance. To operate these appliances we need electric energy. There are many kinds of sources of electrical energy like generator, electric cell or battery. Let us consider a torch light. There are two or there dry cell in series combination is called battery. Copper plate and a small bulb connection with the … [Read more...] about What is electromotive force?
Physics
Carnot Cycle
Carnot Cycle was proposed by the Famous French scientist Sadi Carnot planned an engine having no defect or loss. Actually it is not possible no one could make and will not invent that type of engine has no loss because we know from second law of thermodynamics there a loss must converting energy of form to another. Carnot cycle has four steps evolving isothermal and … [Read more...] about Carnot Cycle
X-Ray Production Theory
Wilhelm Röntgen discovered X-ray production. He was doing research with the discharge tube he observed that fluorescence was produced when cathode rays were incident on barium platino-cyanide sheet placed on the side of the tube. He observed fluorescence on the sheet covering the discharge tube with a thick red paper. Then by placing a thick metallic plate between the sheet and … [Read more...] about X-Ray Production Theory
Combination of Cells
Why cell combination needed? A cell is an electrical element which produces current and a battery is a set of some cells with series or parallel connection. A cell is an active element. To increase the rate of current and voltage supply, cells are connected as manner in series or parallel or mix combination. Internal resistance of those cells is important factor while … [Read more...] about Combination of Cells
How To Read Resistor Color Code
Resistor and Resistance How to read resistor color code? Resistance is a property of conductor. Resistivity depends upon conductor to conductor. Some have less resistivity which is good conductor, some have high resistivity which is bad conductor. In a circuit the wire we use is good conductor and it has low resistivity. There is no material without resistance in the world. … [Read more...] about How To Read Resistor Color Code