Superposition (2)

At First, we calculated Voltage across 6.8k-ohm resistor caused by both 3V and 5V source. We calculated 0.7081V caused by 3V source and 2.01V by 5V source.(We are missing calculation done on 5V source.)

The Setup.

We measured Voltage across 6.8k-ohm resistor with both voltage source to be 2.69V

We measured Voltage across 6.8k-ohm resistor by 3V source is 0.69V.

We measured Voltage across 6.8k-ohm resistor to be 1.98V

We made table of measured and expected Voltage, and calculated the %of difference.

Summary: This lab was straight forward. Use Superposition to figure out Voltage across the 6.8k-ohm resistor due by both 3V and 5V sources separately and then combine it later to obtain total voltage. We first used this technique to calculate voltage across 6.8k-ohm resistor to be 0.71V and 2.01V by 3V and 5V source, respectively. After that, we set up and built circuit and measured the voltage due to 3V and 5V sources separately(we short-circuited the voltage source we are not using) and got 0.69V and 1.98V respectively. The voltages calculated and measured are approximately same with little %
of difference. It is safe to say it is caused by differences in actual resistance in resistor and labeled resistance. Thus the Superposition is very accurate way to calculate unknowns in circuit