lab 1

Purposes:
  • Measuring how much power each resistor absorbs and power supply delivers based on observations.
Instruments:
  • Power Supply
  • Breadboard
  • Resistors
  • Digital multimeters (DMM)
Procedure & Observed Data:
  • 1.  Record the total current passed through the resistors in the series circuit. Calculate the power dissipated for each resistor.
  • 2.  Record the two currents passed through each resistor in the parallel circuit. Calculate the power dissipated for each resistor.



Theoretical Formulas:
P = V * I = (I^2)R
Series Req = R1 + R2  for two resistors R1 & R2
Parallel Req = (R1*R2) / (R1+R2)    for two resistors R1 & R2
Calculation & Error Analysis:
Series:                                                     R1 = 10 kΩ  &  R2 = 10 kΩ   

Parallel:                                                R1 = 100 Ω  &  R2 = 100 Ω



Conclusion:
This lab is basically measuring the efficiency of each resistor. For the series circuit, the percent error is between 0.77 % to 1.07%, and for parallel circuit, the percent error is between 0.20% and 0.80%. Therefore, the precision may be caused by the resistances we used and the systematic error in power supply .

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