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## Electric Fields And Potential And Ohm’s Law

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**Electric Fields**And Potential And Ohm’s Law**Just as the space around Earth and every other mass is**filled with a gravitational field, the space around every electric charge is filled with an electric field.**Electric fieldThe area around a charged object. This field**exerts a force on any charged object in its vicinity. The closer the charged object is brought to the charged object creating the field, the greater the force exerted on it.**An electric field has magnitude and direction. So it is a**…….**VectorIts magnitude (strength) can be measured by its effect**on charges located in the field.**Electric field linesThe electric field can be represented**with electric field lines. The closer the lines are, the stronger the field is.**electric field lines point in the direction which a positive**test charge would accelerate if placed upon the line.**Field lines are always directed from the positive charge and**toward a negative charge.**Electric Potential Energy:The energy a charge possesses by**virtue of its location**Electric Potentialwork done on a charge; or the electric**potential is the potential energy per unit charge (symbol is V; SI unit is volt)**Remember, the term “work” can be replaced with the term**“energy” because to store energy in, or to give energy to, an object, work must be done.**Capacitora device that stores charge in the electric field**between its plates. Each plate carries the same amount of charge, one plate being negative and the other being positive. A potential difference exists between the two plates.**Ohm’s LawGeorg Simon Ohm discovered that the current in a**circuit is directly proportional to the voltage impressed across the circuit and is inversely proportional to the resistance of the circuit**Current = voltage / resistanceI = V / RCurrent (I) –**amperesPotential Difference (V) – voltsResistance (R) - ohms