In the PhET Simulation "Circuit Kit: DC Virtual Lab," set up a circuit with at least two resistors (or bulbs) in series and two resistors in parallel. Measure the total voltage and current of the circuit.

$\displaystyle {V}$ = unit

$\displaystyle {I}$ = unit

Now calculate the total Resistance of the circuit. Make sure you know how to do this using Ohm's Law or by adding Resistors in Series and Parallel.

$\displaystyle {R}$ = unit

Now calculate the total Power of the circuit. Make sure this works using $\displaystyle {P}={I}^{{2}}{R}$ or $\displaystyle {P}=\frac{{V}^{{2}}}{{R}}$.

$\displaystyle {P}$ = unit

Measure voltage across every resistor in the circuit. Does it obey Kirchhoff's Loop rule?

Measure current though every resistor in the circuit. Does it obey Kirchhoff's Junction rule?

If you remove one of the parallel resistors (leaving a gap), what happens to the following quantities?

          Total Current Select an answer Increases Stays the Same Decreases

          Current through the other parallel resistor(s) Select an answer Increases Stays the Same Decreases

          Voltage across the other parallel resistor(s) Select an answer Increases Stays the Same Decreases

Now replace the parallel gap with a wire. What happens to the following quantities?

          Total Current Select an answer Increases Stays the Same Decreases

          Current through the other parallel resistor(s) Select an answer Increases Stays the Same Decreases

          Voltage across the other parallel resistor(s) Select an answer Increases Stays the Same Decreases

Now, replace the parallel resistor that you had removed. Take away a series resistor and fill the gap with a wire. What happens to the following quantities?

          Total Current Select an answer Increases Stays the Same Decreases

          Voltage across the other series resistor(s) Select an answer Increases Stays the Same Decreases