These graphs also exemplified non-mimic devices express no resistance, and can have a variety of applications on our daily lives. Furthermore, results obtained during this experiment showed us the relationship between voltage and time on a capacitor. On the graphs we can appreciate how the capacitor quickly looses its voltage after being charged and then disconnected. Hence, indicating that in a direct circuit unit the current is one directional, meaning it only travels in one direction. Similarly, a capacitor stores voltage, and it does not matter if we change the direction of the current, as it will only be national in one direction.
Procedure: I A capacitor consists of two Conducting Plates separated by an insulating material or dielectric. Figure 1 and Figure 2 are the basic structure and the schematic symbol of the capacitor respectively. During this experiment we charged a capacitor to IV, we allowed to charge by letting it run for 4-5 minutes before disconnecting it from the power supply. Figure 1: Basic structure of the Capacitor Fig: Point circuit diagram We first did this with a buff capacitor and recorded the time it took to discharge, and then e proceeded to repeat the experiment with a buff capacitor.
The capacitor was connected to a circuit with Direct Current (DC) source, two processes, which are called “charging” and “discharging” the capacitor. In Figure 3, the Capacitor is connected to the DC Power Supply and Current flows through the circuit. Both Plates get the equal and opposite charges and an increasing Potential Difference, PVC, is created while the Capacitor is charging. Once the Voltage at the terminals of the Capacitor, PVC, is equal to the Power Supply Voltage, PVC = V, the Capacitor s fully charged and the Current stops flowing through the circuit, the Charging Phase is over.
IVR= Voltage resistance ARC= Resistance of circuit V= Voltage C= circuit ICC=Current of circuit PVC= Voltage of Circuit Voltage resistance Voltage PVC- Voltage of Circuit Figure 3: The Capacitor is Charging For the second part of the experiment, we used wooden circuit board and set it to the same voltage as the one we used for the capacitor (IV). Then we reversed the leads for the power source such that the direction of the current through the circuit was reversed. Furthermore, we use the RL circuit board, in order to SE the 100 ohms resistor, then we applied IV to the circuit and switched the direction just as we did on the latter board.
Finally, we went back to the wooden board and connected the circuit with a Keener diode. Then, we measured the voltage across the resistor while using the PASO interface to look at the output voltage and the voltage across the resistor. Theory: Electrical current is the amount of charge passing by a given point in a conducting path (circuit) per unit time: q/dot. It is agreed for convenience that the direction of the current is the same as the direction of movement of positive hares in electric field.
In a metallic conductor, such as a wire, the only mobile particles are negatively charged electrons, which move in a direction opposite to that chosen for the conventional current. Ohm’s law states that the current that flows in a circuit is directly proportional to the voltage V across the resistance R of the circuit, or in mathematical form: I = V/R A device is said to be ” Mimic” if the current I that flows through the circuit is directly proportional to the potential difference across the resistance. In other words, if V is doubled then I is doubled.
Hence, when we proceeded to disconnect he capacitor from the power supply, the capacitor discharged through the resistor RD and the voltage between the plates dropped down gradually to zero, PVC = 0. When we examine our data graph 1 showed us the relationship between voltage and time on a capacitor. On the graph we can see how the capacitor quickly looses its’ voltage after being charged and then disconnected. It took about 60 seconds for the buff capacitor to go from 51/ to OVA. Graph 2, showed the relationship between the natural log of the voltage and time; which also gives us a declining curve.
Graph 3, shows the relationship between voltage and time on a 1 Pouf capacitor, when we examined the graph determined that it took approximately 300 seconds for the buff capacitor to loose its’ voltage than it did for the buff capacitor. On the other hand, given our data we can safely deduce that the diodes, graph 4 (Voltage vs… Time), gives us a linear horizontal line. Hence, diodes have one directional polarity. Consequently when we inverted the leads, we got another linear horizontal line, but with a value of zero volts. Generally, diodes do not conduct until the voltage reaches the ‘threshold point’.
If the current becomes too high the diode may crack or melt. The keener and regular diode are similar in that they both have specific direction for the current. The keener is a diode designed to conduct current when reverse biased with a specific threshold voltage (a. K. A. Its avalanche point). Because of this, Keener diodes can be used by themselves as voltage-sensitive switches, or in series with a current-limiting resistor to provide voltage regulation. Conclusion: Given our results, we can conclude that in a direct circuit unit the current is one irrational, meaning it only travels in one direction.
Similarly, a capacitor stores voltage, and it does not matter if we change the direction of the current, as it will only be functional in one direction. The polarity of a diode pertains to the nun- direction of the current that runs through it. For instance, when we switched the direction of the current, the voltage was zero. Finally, the applications for diodes and capacitors can be seen as an activator for a diode, when a capacitor can serve for mobile devices, as when we charged it up, current will continuously UN through it until it is discharge.
Hence, capacitors and diodes are called non- mimic devices because they express no resistance. A slow ARC charging circuit stores energy gradually in a capacitor, without requiring high currents from a battery or other source. Then the capacitor can be discharged rapidly through a low resistance. A camera flash is a good example. So is a medical defibrillator; another medical application is in the pacemaker, in which a capacitor discharge provides electrical stimulus to the heart with a regulated period.