Question:
Assertion (A): For measuring resistance of an ionic solution an AC source is used.
Reason (R): Concentration of ionic solution will change if DC source is used.
Assertion (A): For measuring resistance of an ionic solution an AC source is used.
Reason (R): Concentration of ionic solution will change if DC source is used.
Reason (R): Concentration of ionic solution will change if DC source is used.
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Using AC to measure resistance avoids polarization effects caused by DC current in ionic solutions.
Updated On: Jul 11, 2025
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
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The Correct Option is A
Solution and Explanation
An AC source is used to measure the resistance of ionic solutions because the ionic solution's conductivity changes when a DC source is applied, leading to errors. Therefore, an AC source ensures that there is no chemical change in the ionic solution, making the measurement accurate. Hence, Reason (R) explains Assertion (A).
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