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SECTION 1: ELECTRICAL FUNDAMENTALS. ENGR 201 – Electrical Fundamentals I. 2 Introduction. Electricity – what is it? 3. Fundamental form of energy. Resulting from charge differentials. Electrons are the carriers of electrical charge. Electron is negatively charged. Hole – absence of an electron – is positively charged. May occur naturally.
Electrical Energy. Our modern technological society is largely defined by our widespread use of elec-trical energy. Electricity provides us with light, heat, refrigeration, communication, elevators, and entertainment.
Electrical power is the prime source of energy that supports almost all of our technologies. Electricity is the most convenient and omnipresent energy available today. The high efficiency: 1. The machines-generators are over 98% 2. Transformer efficiencies routinely reach 98% and can reach over 99.5%, 3.
Energy: Energy is de ned as the capacity of doing work against a possible resisting force. It is denoted by W and the unit of energy is joule (J). In transfering charge through an element work is being done, or energy is being supplied. To know whether energy is supplied to element or by the element to the rest of the circuit, we must know both
14 sty 2018 · electrical energy includes electrical potential in an electrostatic eld and electrical potential in an inductive- eld, i.e. magnetic eld. Electrical energy is often
The energy level of an electron is proportional to its distance from the nucleus. Higher energy level electrons exist in orbits, or shells, that are farther away from the nucleus. These shells nest inside one another and surround the nucleus.
The electrical energy is the total power delivered or consumed over a given time interval. i.e., Energy = ( Power x Time ) Watt seconds or Joules. If t is in hours, P is in kilo-watts, then the energy is expressed in kilo-watt-hours (KWh). One KWh is referred as one unit of energy.
