Arrange the following materials in the ascending order of their resistivities:
(A) Iron
(B) Aluminium
(C) Platinum
(D) Silver
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (D), (B), (A), (C)
Resistivity is a property of the material: the better the conductor, the lower its resistivity. Approximate values at room temperature are:
\( \text{(D) Silver: } 1.6\times10^{-8}\,\Omega\,\mathrm{m} \)
\( \text{(B) Aluminium: } 2.7\times10^{-8}\,\Omega\,\mathrm{m} \)
\( \text{(A) Iron: } 10\times10^{-8}\,\Omega\,\mathrm{m} \)
\( \text{(C) Platinum: } 11\times10^{-8}\,\Omega\,\mathrm{m} \)
Ascending order: (D), (B), (A), (C).
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic was removed from the latest NCERT book (2026-27), but it is still in the CUET 2026 syllabus, so do not skip it.
NCERT (Pre-rationalised edition, 2022-23):
Resistivity of Various Materials – …
