Question

Why ac current is used in measurement of conductance in cell?

Answer 1

Explanation:

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Using DC causes polarisation of the electrodes and electrolyte which leads to error in measured conductance values over a period of time.

In AC there is no polarisation due to non-continuous flow of current, hence,AC is used.

Answer 2

Explanation:

Alternating current is used to prevent electrolysis of the electrolytic solution so that concentration of ions in the solution remain constant. ,conductivity could be determined using direct current as an application of Ohm's Law so alternating Current is used.