✔ 最佳答案
Assume comparing the service life of a Zn-C cell with an alkaline Mn cell of the same size.
Apparatus & Chemicals required:
- Computer with data logging software installed, connection cords for data-logger, data-logger, power supply for data-logger, voltage sensor
- Cell holder for AAA size dry cell
- 4 connecting wires fitted with crocodile clips at both ends
- 3 bulbs(2.5V) in holders, connected in parallel
- New Zn-C dry cell(AAA size)
- New alkaline Mn dry cell(AAA size)
┌──────Cell──────┐
︱-----------------------------------------︱
︱---------┌──Bulb──┐--------︱
├───┼──Bulb──┼───┤
︱---------└──Bulb──┘--------︱
︱-----------------------------------------︱
└─── Voltage sensor ────┘
----------------------︱
----------------------︱
----------------Computer
(請忽略虛線)
Allow the cell to discharge until the voltage drops below 0.8V
The result should be(approximately) :
Zn-C cell: 12 min
Alkaline Mn cell:50 min