# In this exercise, assorted combinations of ceramic resistors allow

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```					Name_______________________________________ Date _______________Hr __________

Series, Parallel and Equivalent Circuits

In this exercise, assorted combinations of ceramic resistors allow us to view the concepts of conservation of
energy and conservation of charge in a new light. In the drawings below, rectangles with letters in them
represent the different resistors available. D = 10, C = 51, and E = 68.

Set-up

1. Connect the Current Probe to Channel 1 and the Differential Voltage Probe to Channel 2 of the interface.

2. Open the file “23a Series Parallel Circ” in the Physics with Vernier folder. Current and voltage readings
will be displayed in a meter.

3. Connect together the two voltage leads (red and black) of the Voltage Probe. Click           , then click
to zero both sensors. This sets the zero for both probes with no current flowing and with no voltage
applied.

I. Series circuits:       For the series circuits described below, measure the current at each of the labeled
points by placing an ammeter into the circuit at that point. Measure the potential difference across each
resistor and “battery” by connecting a voltmeter in parallel with each. While making these measurements,
ensure that the “battery” power remains unchanged. Calculate the power input by the battery and the power
dissipated in each resistor.

What conclusions arise from the
data for current and potential in
this circuit? Does the data support
the conservation of charge?
Power? If you could replace all
three resistors with one resistor
what would the value have to be
to not affect the current in the
battery?

II. Parallel Circuits: For the parallel circuit shown, measure the current at each of the labeled points. In
addition, measure the potential difference across each resistor and the E. Calculate the power input by the
battery and power dissipated in each resistor.

What conclusions arise from the data for
current and potential in this circuit?
Does the data support the conservation
of charge? Power? If you could replace
all three resistors with one resistor what
would the
value have to be to not affect the current
in the
battery?

```
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