Verify Ohm's Law, Kirchhoff’s Current and Voltage Laws - Lab 1 | PHYS 375, Lab Reports of Physics

Download Verify Ohm's Law, Kirchhoff’s Current and Voltage Laws - Lab 1 | PHYS 375 and more Lab Reports Physics in PDF only on Docsity! — PHYS 375 Spring 2008: Lab 1 — Purposes Get familiar with the usage of electronics breadboard, DC power supplies and digital multi-meter. Experimentally verify Ohm’s law, and Kirchoff’s current and voltage laws. 1 Resistance 1.1 Ohm’s law Build the circuit shown in Figure 1. You will use the DC power supply and you should make sure the (-) connector is shortened to the (GRD) connector on the supply (using the small metallic bridge). In order to verify Ohm’s law you will need to vary the voltage of the power supply and record the current flowing through the resistor. RV Figure 1: Circuits part 1. • The voltage can be varied directly on the power supply, and the output voltage can be measured on the power supply directly (no need for a digital multi-meter). • Insert in the circuit a current measurement. • Vary the voltage and measure the corresponding current flowing through the resistor for R=1 kΩ and R=1 kΩ. • Plot V versus I for the two cases of resistance values. Is the dependence of V on I linear? • From a fit of the obtained data compute the resistances and compare with the values used. Discuss the errorbars on the inferred resistance values. 1.2 Nonlinear effects Modify the previous circuit by replacing the resistor with an incandescent bulb (not a diode!). 1