# Experiment 2.docx - Experiment 2 resistors in series and...

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Experiment 2 – resistors in series and parallel connections (1)Lab Date – 7/6/17Report Date – 7/11/17Inderjit KaurPHY2049L – Section 8Lab instructor – UdeniPurpose: The purpose of this experiment is to learn how to use a digital multimeter to obtain measurements for voltage, current, and resistance and how to set up resistors in series and parallel connections.Theory:Ohm’s law defines the relationship between voltage (V), current (I), and resistance (R) as R = V/I. When resistors are in series connection, the current flowing through each resistor is the same (I = I1= I2) and the voltage across the circuit is the sum of the voltage across each resistor (V = V1+ V2). Resistance of power supply is equivalent to sum of resistance of resistors in series connection (Rs= R1+ R2). When resistors are in parallel connection, the total current is the sum of currents flowing through each resistor (I = I1+ I2) and the voltage across each resistor is the same (V = V1= V2). Resistance in parallel connection can be determined by the following equation set up (1/Rs= 1/R1+ 1/R2). Power dissipated in a resistor is given by P = IV = I2R.Methods and Apparatus: The equipment used is: digital multimeter, DC power supply (#1 5V and #2 HY152A), four light bulbs, banana connectors, and a demo box of resistors.Arrange the equipment by following the circuit figures described for each measurement.
Discussion/Conclusion:This experiment was completed satisfactorily. Measuring the light bulbs in a series connection showed that increasing the number of resistors (light bulbs) would increase the resistance but decrease the overall current.