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Electrochemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
MCQ
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: The electrical resistance of any object decreases with increase in its length.
Reason: The electrical resistance of any object decreases with increase in its area of cross-section.
  • A
    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.
  • ✓
    Assertion is wrong statement but reason is correct statement.
✓

Answer

Correct option: D.
Assertion is wrong statement but reason is correct statement.
The electrical resistance of any object is directly proportional to its length$, l$, and inversely proportional to its area of cross$-$section$, A.$ So, it increases with increase in length of object and decreases with increase in area of cross$-$section of object.

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