UNIT 4: ĐIỆN NĂNG

Tham khảo tài liệu unit 4: điện năng, kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả
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UNIT 4: ĐIỆN NĂNG ELECTRICAL ENERGY ELECTRIC CIRCUIT06.06.11 MAIN POINTS ENERGY ELECTRICAL ENERGY ELECTRIC CIRCUIT06.06.11 ENERGY• Energy: the capacity to do work (or produce heat).• Kinetic energy: the energy of motion.• Potential energy: the energy of position; stored energy.06.06.11 Kinetic energy – Thermal energy: submicroscopic particles in motion. – Mechanical energy: macroscopic objects in motion. – Electrical energy: movement of electrons through a conductor. – Sound energy: compression/expansion of spaces between molecules.06.06.11 Potential energy – Chemical potential energy: position of electrons relative to atomic nuclei in bound atoms. – Gravitational energy: position of an object in a gravitational field. – Electrostatic energy: relative position of charged particles.06.06.1106.06.11 ELECTRICAL ENERGY• Electrical Energy - The energy associated with electric charges and their movements• Electric Power - The amount of energy produced per second. The power produced by an electric current.06.06.1106.06.1106.06.1106.06.1106.06.1106.06.1106.06.1106.06.11 KINDS OF CIRCUITS• SERIES Req = R1 + R2 + R3• PARALLEL 1 / Req = 1 / R1 + 1 / R2 + 1 / R3 + ...06.06.11 Ohms law• the potential difference or voltage drop (V) between the ends of a conductor and the current (I) flowing through the conductor are proportional at a given temperature: – V=IR06.06.11 Kirchhoffscurrentlaw Kirchhoffscurrentlaw i1 + i4 = i2 + i306.06.11 Kirchhoffsvoltagelaw Kirchhoffsvoltagelaw v1 + v2 + v3 + v4 = 006.06.11 REFERENCE• GLENBROOK.K12.IL.US• EDHELPER.COM• HYPERPHYSIC.PHY-ARTR.GSU.EDU• ACTEWAGL.COM.AU06.06.11