Ohm's Law and Single Resistor Circuit
Purpose 1. Experiment with a single resistor circuit. 2. Analyze how one variable affects another while the third variable is kept constant. Provide reasoning to support Ohm’s Law by collecting data to interpret and analyze a graph and write a three-step conclusion.
Procedure:
1. Go to the University of Colorado – Simulations. Click on the Battery-Resistor Circuit simulation, then click on Run Now! 2. Using the information from “Think About This”, hypothesize the relationship between voltage and current. 3. Analyze a single resistor circuit. * Select a resistance value of your choice between .1-Ohms and .4-Ohms by adjusting the slider on the right side labeled resistance. * Select a voltage value of 0.0 by adjusting the slider on the right side labeled voltage. * Read the current (Amps) from the ammeter on the lower left connected to the pinwheel. Record the values in Table 1. * Select a new voltage and read the current. Record these values in Table 1. Repeat for 3 more trials. * Using Graphical Analysis, construct a graph of your data with Voltage on the y-axis and Current on the x-axis.
Table 1 1. * | Voltage calculated
(Volts) | Current (amps) | 1 | 0.0 | 0.0 | 2 | 1.94 | 5.74 | 3 | 4.38 | 8.91 | 4 | 4.98 | 10.11 | 5 | 5.13 | 14.83 |
Resistance Value used ___465_________Ohms
Analysis:
Write a three part conclusion. Remember to include a discussion of your hypothesis, how your selected resistance and slope value compare, and discussion of any possible sources of error.
Ohm's law has sometimes been stated as, "for a conductor in a given state, the electromotive force is proportional to the current produced." That is, that the resistance, the ratio of the applied electromotive force (or voltage) to the current, "does not vary with the current strength." The qualifier "in a given state" is usually interpreted as meaning "at a constant temperature," since the
Procedure:
1. Go to the University of Colorado – Simulations. Click on the Battery-Resistor Circuit simulation, then click on Run Now! 2. Using the information from “Think About This”, hypothesize the relationship between voltage and current. 3. Analyze a single resistor circuit. * Select a resistance value of your choice between .1-Ohms and .4-Ohms by adjusting the slider on the right side labeled resistance. * Select a voltage value of 0.0 by adjusting the slider on the right side labeled voltage. * Read the current (Amps) from the ammeter on the lower left connected to the pinwheel. Record the values in Table 1. * Select a new voltage and read the current. Record these values in Table 1. Repeat for 3 more trials. * Using Graphical Analysis, construct a graph of your data with Voltage on the y-axis and Current on the x-axis.
Table 1 1. * | Voltage calculated
(Volts) | Current (amps) | 1 | 0.0 | 0.0 | 2 | 1.94 | 5.74 | 3 | 4.38 | 8.91 | 4 | 4.98 | 10.11 | 5 | 5.13 | 14.83 |
Resistance Value used ___465_________Ohms
Analysis:
Write a three part conclusion. Remember to include a discussion of your hypothesis, how your selected resistance and slope value compare, and discussion of any possible sources of error.
Ohm's law has sometimes been stated as, "for a conductor in a given state, the electromotive force is proportional to the current produced." That is, that the resistance, the ratio of the applied electromotive force (or voltage) to the current, "does not vary with the current strength." The qualifier "in a given state" is usually interpreted as meaning "at a constant temperature," since the