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A c t i v i t y 1 – A d d T h e m U p ! !
Math Concepts
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Data collection
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Statistical plots
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Math modeling
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Multiplication as repeated addition
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Using a pattern to develop a formula
Materials
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CBL 2™
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TI Graphing Calculator
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6-inch unit-to-unit link cable (or any length)
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TI voltage sensor
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5 same size 1.5-volt batteries (for example, AA (LR6) or AAA batteries)
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Ruler with ridge down the center or any other device to hold the batteries in place
Introduction
Every day people use one or more batteries when they use a flashlight, their
calculator and CBL 2, or any other battery-operated devices. Have you ever put
batteries in a flashlight or your CBL 2? How much power do they get from the
batteries inside?
Look on the outer jacket of your batteries. You should see a positive terminal (+)
and a negative terminal ( − ) at the ends of the battery. You also will see the size, for
example AAA, and the voltage, for example, 1.5 VOLTS.
If you look at the position of the batteries in many flashlights, you will notice that
they are lined up in a column or a series. The batteries in the flashlight are lined up
so that the positive terminal (+) touches the negative terminal (−). Observe the
position of the batteries in the CBL 2. You will notice that even though the
batteries are not in a row, the battery terminals alternate and there is a piece of
metal connecting the positive terminals (+) with the negative terminals (−). These
batteries are connected in series or serial arrangement (see the figure on the next
page). Batteries supply electrical energy to electronic devices when a circuit is
created. For now, think of a circuit as a path linking the positive terminal to the
electronic device (the load) and then back to the negative terminal.
This investigation will help you explore how many total volts several batteries in
series provide to battery-operated devices!
© 2000, 2003 T
I
EXAS
NSTRUMENTS
Science Concepts
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♦
♦
I
NCORPORATED
Data collection and analysis
Measurement of electrical energy
Batteries in series; series circuit
G
S
ETTING
TARTED WITH THE
CBL 2™ S
31
YSTEM
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