Ohm's Law

Introduction

  

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:

 

Where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.

The law was named after the German physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current through simple electrical circuits containing various lengths of wire. He presented a slightly more complex equation than the one above to explain his experimental results. The above equation is the modern form of Ohm's law

V, I, and R, the parameters of Ohm's law.

My Learning on the 2^nd week of leacture

Voltage = Force

Current (I) = Motion

Resistance = Friction

therefore, the higher the force:the higher the motion and it is a direct proportion :)

Common techniques in circuit analysis and design :

-> combining resistors in series and parallel 

-> voltage and current divisions

-> wye to delta and delta to wye transformations

ohms law states that the voltage across an element is directly proportional to the current flowing through it:

           v α i

thus, v=iR and r = v/i

-> r is called resistor

-> has the ability to resist the flow of electric current

-> measured in ohms (Ω)

smt = surface mount technology

Overview:

 In our 2^nd week of lecture we tackled about the ohms law, passive and active elements, dependent current and independent current. We also finished our 2^nd laboratory experiment which we familiarized the electrical materials we used. We familiarized about 8 electrical materials including the RESISTOR, INSULATOR, and CAPACITOR I also learned from sir jay whenever the circuit is a passive element or passive element.