Arrange the following materials in increasing order of their resistivities. (A) Tungsten Choose the correct answer from the options given below: |
(A)<(B)<(C)<(D) (D)<(C)<(B)<(A) (B)<(A)<(D)<(C) (C)<(D)<(B)<(A) |
(D)<(C)<(B)<(A) |
The correct answer is Option (2) → (D)<(C)<(B)<(A) Resistivities at 20°C (approx): $\text{Copper} \; \rho \approx 1.68 \times 10^{-8}\ \Omega m$ $\text{Gold} \; \rho \approx 2.44 \times 10^{-8}\ \Omega m$ $\text{Aluminium} \; \rho \approx 2.82 \times 10^{-8}\ \Omega m$ $\text{Tungsten} \; \rho \approx 5.6 \times 10^{-8}\ \Omega m$ Increasing order: Copper < Gold < Aluminium < Tungsten ${(D) \lt (C) \lt (B) \lt (A)}$ |