Ohm's Law and Resistor Connections: Series and Parallel, Study notes of Law

Download Ohm's Law and Resistor Connections: Series and Parallel and more Study notes Law in PDF only on Docsity! Experiment 3 Ohm's law and Connect the resistors series and in parallel OBJECTIVE 1. Achieving Ohm's law by studying the relationship between the voltage and current of an electric circuit. 2. Achieve two laws of series and parallel connections. Theory: Resistance: the measure of the degree to which a conductor opposes an electric current through that conductor. How it works: Resistors resist the passage of electrical current by absorbing a fraction of the electrical energy and dissipating it in the form of heat, that is, it works to control its passage. The higher the resistance of the conductor, the less the current is passing through. The resistors are the simplest electronic component. Ohm's law: The voltage difference (V) between the two ends of the conductor is directly proportional (linear relationship) to the intensity of the current (I) when the temperature is fixed, as the temperature affects the resistance of the material, this relationship is expressed as follows: V = I R R(Ω) = V (volt) / I (ampere) Where R is the constant of proportion, it is called a resistor and its unity is called ohms and is symbolized by the Greek symbol Ω and om is read. Definition of current: The current passing through the resistor conductor (R) is the amount of charge passing through the conductor in the time unit. It can be measured by an ammeter (a device used to measure current) that is connected in a circuit series. Unit: Ampere (A) voltage difference: It is the energy generated by the passage of the unit of charge in the circuit. It can be measured by a device called voltmeter, which is connected in a circuit in parallel. Its unity: volt. Methods of connecting resistance: 1- Serial connection: The current passes in the case of serial connection through the resistance one by one. Thus, the current passing through them is the same as the current from the source (battery) Equivalent resistance under the ohms (RS) law: 2- Parallel connection: When two resistors are connected in parallel, the voltage difference on each is the same as the voltage difference (V) of the source meaning that the total current (IT) from the source is distributed to them Equivalent resistance according to the ohm law (Rp):