Download 10-7 Cells in series and parallel

10.7 Cells in Series and Parallel
(page 310)
10.7 Cells in Series and Parallel
A “dry cell” is another term for a battery.
Dry cells can be put together in two ways to change the energy
they give each electron as it travels through the battery and out
the negative terminal:
-In a series circuit (so they have more power)
-In a parallel circuit (so their power lasts longer)
Cells in a Series
Connecting cells in series increases the electric potential
(voltage) produced at the negative terminals of the batteries.
As the electron travels through each battery, it gets an
additional boost of energy increasing its voltage.
When an electron leaves the negative terminal of a battery and
enters the positive terminal of the next battery it picks up more
voltage.
The electron exits the negative terminal of the battery and now
has double the voltage .
Cells in Parallel
The cells are connected side by side (in parallel) to increase the electric
charge.
The electrons flow through only one cell before passing through the
load.
The electric potential (voltage) of the electron doesn’t increase like it
does in a series circuit.
But…
With two cells there is twice as much electric energy available and the
load can operate twice as long before running out of energy.
Series Circuits and Parallel Circuits
Series Circuit: This circuit is wired in one single path.
Ex: Christmas lights: If one bulb burns out, all the lights have to be
checked to find the burned out bulb.
Parallel Circuit: The electrons pass through separate circuits called
branch circuits.
Because each bulb is connected to its own branch circuit, it does not
affect the other bulbs.
Series Circuits
Parallel Circuits