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Volt Ohm Milliammeter Lab Report

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Volt-Ohm-Milliammeter (VOM) or a multitester is a device which can read electrical quantities of DC and AC-sinusoidal voltages, resistance, and small DC currents. It is use mostly by radio and television servicemen. Furthermore, a lot of jobs are made easier and better with the aid of a multitester. Detecting dead or low voltage batteries and battery cells, trouble shooting electrical circuits, and automobile radio installation and service are few of these occupations (Simpson Electric Company, 2010).
This experiment uses VOM to determine electrical quantities, to differentiate direct current (DC) from alternating current (AC) voltages and currents, to calculate the peak value of a sinusoid from its root mean square RMS value, to identify …show more content…

After this, use the VOM as a DC voltage and determine the estimated value of the voltage across the battery and choose the appropriate scale. Afterwards, in order to get the actual value of the voltage for a 1 cell battery, experimenter should connect the positive side of the probe to the positive side of the battery and the negative probe to the negative side of the battery. Then record the position of the pointer in the scale and get the corresponding actual value of the voltage. Repeat this step for 2 cell battery. For the AC voltage measurement, experimenter use convenience power outlet as a voltage source. Experimenter repeats the steps from DC voltage measurement except the voltage source no longer has a positive or a negative end so just connect the positive and negative probe to the outlet after setting the VOM to ACV.
For the last part of the experiment which is VOM as a DC ammeter, first calculate for the estimated current using the ohm’s law (I=V/R) and use the value to estimate the proper range to set the VOM. Then, experimenter set up the circuit as shown in Figure 1. Then, set the decade resistance box to 750 ohms. After that, close the switch and read the current and record the position of the pointer on the scale and its corresponding actual value. After this, open the switch and set the decade resistance box to 100 ohms. Then, repeat the steps done in the 750

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