Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (Q.18 to Q.20)
(а) Assertion and reason both are correct statements and reason is correct explanation for assertion.
(b) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
Assertion: ECe|, should have a positive value for the cell to function.
Reason: Ecathode, < Eanode . [NCERT Exemplar]
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Both assertion and reason are correct and reason is the correct explanation of assertion. Concentration of ionic solution changes on using DC current as a source of energy while on passing AC current concentration does not change Hence AC source is used for measuring resistances.
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