physics assinment
...rents, the fuse merely acts as a conductor. But when the current exceeds the rated capacity of the fuse, it overheats, melts and leaves an air gap in the circuit. So the there will be no current in the circuit, then the equipment won’t be destroyed because of the overloaded current. The way that a circuit breaker acts to protect the electrical equipment is similar as the fuse. However, the circuit breaker normally is thermal-magnetic devices. They use a combination of bimetallic strips and electromagnets to provide both thermal and magnetic protection from excessive currents. The difference between a fuse and a circuit breaker is the circuit breaker can be used again. Every time the current exceeds the overload value, the circuit breaker trips and remains off until it is reset. 3. You can summarize Electricity and Magnetism in a set of equations called Maxwell’s equations…….write down these equations. What is the genus contribution by Maxwell which made his equations so important? In 1864, at about the time that American Civil Ware was ending, the great Scottish physicist James Clerk Maxwell combined all of the ideas and discoveries of electricity and magnetism in one unified picture of electro-magnetism. Maxwell showed that a complete description of electromagnetic effects could be based on a set of only four equations. These four equations are: 1.Gauss’s law for electricity. This law describes the electric field due to electric charges and can be used to derive Coulomb’s law. 2. Gauss’s law for magnetism. According to this law, magnetic field lines are continuous and without end, and thus there are no isolated magnetic poles. 3.Ampere-Maxwell’s law Maxwell extended this law to describe the production of magnetic fields not only by electric currents but by changing electric fie...