An experiment is conducted with a 12-V battery and four 1-ohms resistors.

Experiment 1:

1. Wire the battery to a resistor, calculate the equivalent resistance, measure the total current, and calculate the power dissipated by the resistor in the circuit.

2. Add the second resistor in series, and repeat the measurements and calculations.

3. Add the third resistor in series, and repeat the measurements and calculations.

4. Add the fourth resistor in series, and repeat the measurements and calculations.

5. Graph the results.

Experiment 2: Follow the same procedure for Experiment 1, but wire the resistors in parallel for this second experiment.

The following graphs were obtained from the two experiments:

Using the graphs, answer the following questions:

1-

(a) Describe the behavior of the equivalent resistance of the circuit as you add resistors in series versus parallel.

(b) Describe and explain the behavior of the current through the power supply as you add resistors in series versus parallel.

2-

(a) Describe and explain the behavior of the power demanded of the power supply as you add resistors in series versus parallel.

(b) If the resistors were lightbulbs in strings of holiday lights, one wired in series and one in parallel, what can be said about the brightness of an individual bulb as you increase the number of bulbs? Explain your reasoning.