Polarization of the Cell
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-348
2025-12-28
483
When the circuit is made in the simple voltaic cell, it is noticed that, while bubbles of hydrogen rise to the surface of the liquid, the copper plate is kept pretty nearly covered by them all the time. This causes what is known as polarization of the cell and has two effects: (1) it reduces the amount of surface of the plate exposed to the liquid, and (2) it reduces the difference of potential between the plates. Both of these results tend to lessen the amount of current that can be sent by the cell. The usual way in which this difficulty is overcome is by the. use of a kind of liquid that will oxidize the hydrogen before it is deposited on the plate.
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