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Electrical circuits are made of metallic wires like copper because metals are excellent conductors of electricity that easily allow current to pass through them.Conventional current is historically defined as flowing from the positive to the negative terminal of a battery, whereas free electrons physically flow from the negative terminal, which has an excess of electrons, to the positive terminal.The main function of an electric generator is to convert mechanical energy into electrical energy by rotating a conductor, such as a copper wire, inside a magnetic field.Electric current is the flow of electric charges due to the movement of free electrons in a particular direction from an excess region to a deficit region.A parallel circuit is preferred for household wiring because it ensures that each appliance gets the original voltage and operates independently, so that if one appliance is damaged, the others continue to work.One Ampere is defined as the current flowing through an electrical conductor when one Coulomb of charge passes through it in one second.A resistor is an electrical component with resistance that is designed to limit, regulate, or oppose the flow of electric current in a circuit.A primary cell relies on an irreversible chemical reaction and cannot be recharged, whereas a secondary cell relies on a reversible chemical reaction, allowing it to be recharged and reused.You must always stand on an insulator such as a rubber mat or wooden board, avoid touching appliances or switches with wet hands, and use only certified, properly insulated wires.The three subatomic particles that make up an atom are protons, which are positively charged, electrons, which are negatively charged, and neutrons, which carry no charge.An electric circuit is a complete and closed path through which electric current flows from one terminal of a power source to another.A Miniature Circuit Breaker is an automatically operated safety device that detects slight current fluctuations more sensitively than a fuse and interrupts the current without needing wire replacement, allowing it to be easily reset.A dry cell consists of a zinc container negative electrode, a central carbon rod positive electrode surrounded by manganese dioxide and carbon, and a moist paste of ammonium chloride and plaster of Paris acting as the electrolyte.Potential difference is defined as the amount of work done in moving a unit charge from one point to another in an electrical circuit.In a series circuit, if one appliance gets damaged or is removed, the entire circuit is broken and all other appliances connected in the series stop working immediately.Electricity is generated from wind when the kinetic energy of the blowing wind rotates the blades of a windmill, which in turn rotates a generator to produce electric current.
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Chapter: 07. Electricity
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