0000004797 00000 n complete the table in your notebook. Connecting the wiper to one end terminal prevents the variable potentiometer is a resistor with a third contact (arrow), which is internally Voltage dividers are used in a variety of applications like variable resistors (potentiometer), LDR, thermistors and cutting-edge devices like an accelerometer. Your sample calculation should show the algebraic equation, substitution of your ��k�W�՛�͆��Ѩ�PD�Ɇh9�Lۭ�����ЪEkם���ʴjPjȁ�¦a `�2 Voltage dividers are used in many applications but they are widely used in all types of variable resistors. The potentiometer has three terminals two of the terminals are connected to the ends of the resistor and middle terminal is connected to the wiper. In this lab you will build 3 different voltage divider circuits and explore their behavior. resister from appearing as an open circuit, but will be limited to a maximum Voltage division rule and current division rule are necessary to understand voltage and the current flowing through each resistor. resistances from each end terminal to the wiper. voltage divider you constructed in part 2 as a voltage source. When we say the current ‘I’ is passing flowing through the resistor ‘R,’ it logically follows that a force working across resistor R. This force is known as potential difference or voltage drop across resistor R. Similarly, if we consider any part of the electric circuit three quantities i.e. Link & Share. H�lT�n�0��+�HKR�H���J�"q GIQ=(��p�V����㶁a��������l��}�+K 4pts) Show You will calculate the source resistance for the five Thus in the given circuit, the values of the voltage across each resistor are. of your bench-top power supply. different output voltages using your measurements of resistance and voltage. 1) The Potentiometer Obtain a 1 K trim pot and an adjustment tool. equation, and the numerical result. Lab 2: Voltage Dividers. without moving the wiper and 3) measure the two resistances of the pot, the 0000001774 00000 n Only a small range of 2pts) Show a sample calculation of Rsource using the equation you derived for your table above. Adjustability is commonly designated in schematic symbols by equation, substitution of your numerical values into the equation, and the Test board; Resistors; 1-kΩ Potentiometer; BNC T Connector ; Part A: Measuring AC Voltage with the DMM. 98 0 obj <>stream material. We can apply the current divider rule to the parallel circuit analyzed in the lab as follows: The voltage divider and current divider rules can be extended to other circuit elements as long as these elements are in series and parallel circuits, respectively. Using your DMM, measure the resistance across the end terminals of the pot, RAC. Components: Design and construct a voltage divider that divides an input voltage by three. complete the table in your notebook. 0000006135 00000 n It’s one of the most useful and important circuit elements we will encounter. Measure Vin 0000010219 00000 n <<4BEF0305B34769418796A75EFBB56CFB>]>> Note, you should always use the most sensitive scale for your A trim pot is designed to be used on the circuit board to make adjustments in the Construct and Q 4) 2pts. readjust the wiper). 0000003044 00000 n Demonstrate and explain operation of this voltage divider to lab instructor. You will need them 0000002608 00000 n values of the resistors, what would be the maximum and the minimum voltage different voltage divider circuits and explore their behavior. You voltage divider using 3.3 K and 6.8 K resistors to provide ~ 3.3 V source. an adjustment tool, a solderless bread board, cables, and wire. It can be simply calculated by adding all of them as they are connected in series. fully counterclockwise, approximately half way, and fully clockwise (total of 9 Lab 3 » Resistive Voltage Dividers; ELEC 240 Lab. Whereas, series circuits are known as voltage divider circuits because here voltage is divided across all the resistors. The output Although you can achieve this by using the Show a sample PART 4) Fixed Voltage Divider.   Observations and Conclusions. Construct a fixed In this class we will use trim pots because they are PART 3) Source Resistance of a Voltage Divider. the derivation of the source resistance of the voltage divider from VOC and Vload. should show the algebraic equation, substitution of your numerical values into ��x�8��J�@Aacc��a�lH�I�K0��III��)X3���B�%::p� h30)�ҠP�kQf`����(�h�8�i�n���^0h1K2�f�����6�i��̦LM �|L+��*�f,u8�/�p�a'P�]�G�~00p%1p0�1d2�adQ1ex�P�&K��^p30��=S�9��@� � ��� They should be constants for all three sets of measurements. %PDF-1.4 %���� Table 2) 15pts. Summary Not provided. with cw by that fixed end terminal. In order to do this lab you need to understand the characteristics of resistors, potentiometers (pots), voltmeters, and power supplies. Construct and include the adjustability in the parameter x, which divides R want a more precise 3.3 V source. PART 2) The Potentiometer as a Voltage Divider. Construct a table in your notebook to do this. important practical consideration. The two outside pins are connected to the voltage source and the middle terminal acts as a voltage divider. show the algebraic equation, substitution of your numerical values into the

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