3ºc TPR Monica Blanco Roberto Fernanz

*What is a circuit? A  circuit is a path or line through which an electrical current flows. The path may be  closed (joined at both ends), making it a loop. A closed circuit makes electrical current flow possible. It may also be an open circuit where the electron flow is cut short because the path is broken. An open circuit does not allow electrical current to flow. *What are the elements of a circuit? Battery:  is a source of energy which  provides a push - a voltage - of energy to get the  current flowing in the circuit . Wires:  is used to carry the flow of electrons. Metal  wire  is a very good conductor. Switches:  is any device used to interrupt the flow of electrons in a  circuit. Motor: is an electrical machine that converts electrical energy into mechanical energy. Lamps: is used to determine whether or not electricity is flowing.   Leds: a type of lamp. Resistor :  is a passive t...

Electricity is the flow of electric curremt along a conductor. This electric current take the form of free electrons that transfer from one atom to the next, The more free electrons a material has, the better it conducts. The volt:  The pressure that is put on free electrons that causes them to flow is known as electromotive force (EMF). The volt is the unit of pressure, i.e., the volt is the amount of electromotive force required to push a current of one ampere through a conductor with a resistance of one ohmS. The Ampere:  The ampere defines the flow rate of electric current. For instance, when one coulomb (or 6 x 1018 electrons) flows past a given point on a conductor in one second, it is defined as a current of one ampere. The ohm:  The ohm is the unit of resistance in a conductor. Three things determine the amount of resistance in a conductor: its size, its material, e.g., copper or aluminum, and its temperature. A conductor’s resista...