Question

amt general comp 13: question 33 of 60
in nickel - cadmium batteries, a rise in cell temperature
a causes an increase in internal resistance.
b causes a decrease in internal resistance.
c increases cell voltage.

Explanation:

In nickel - cadmium batteries, as the cell temperature rises, the kinetic energy of the ions and electrons increases. This leads to easier movement through the electrolyte and electrodes, reducing the opposition (internal resistance) to the flow of current. Cell voltage is mainly determined by the electrochemical reactions and the state of charge of the battery, not directly by a rise in temperature in the way described for internal resistance.

Answer:

B. causes a decrease in internal resistance.