Consider four conducting materials copper,
Question:

Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity $\rho_{C}, \rho_{T}, \rho_{\mathrm{M}}$ and

$\rho_{A}$ respectively. Then :

  1. (1) $\rho_{C}>\rho_{A}>\rho_{T}$

  2. (2) $\rho_{M}>\rho_{A}>\rho_{C}$

  3. (3) $\rho_{A}>\rho_{T}>\rho_{C}$

  4. (4) $\rho_{A}>\rho_{M}>\rho_{C}$


Correct Option: , 2

Solution:

(2) $\rho_{M}=98 \times 10^{-8}$

$\rho_{A}=2.65 \times 10^{-8}$

$\rho_{C}=1.724 \times 10^{-8}$

$\rho_{T}=5.65 \times 10^{-8}$

$\therefore \rho_{M}>\rho_{T}>\rho_{A}>\rho_{C}$

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