A rod of length land negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths Fig. The cross-sectional areas of wires A and Bare 1.0 mm² and 2.0 mm², respectively.
$({\mathrm{Y}}_{\mathrm{Al}}= 70 \mathrm{x} {10}^9 {\mathrm{Nm}}^{-2} \mathrm{and} {\mathrm{Y}}_{\mathrm{steel}}=200 \mathrm{X} {10}^9 {\mathrm{Nm}}^{-2})$
 

(i) Mass m should· be suspended close to wire A to have equal stresses in both the wires.
(ii) Mass m should be suspended close to wire B to have equal stresses in both the wires.
(iii) Mass m should be suspended at the middle of the wires to have equal stresses in both the wires.
(iv) Mass m should be suspended close to wire A to have equal strains in both the wires.

• A

  (i, ii) 

• B

  (i, iii)

• C

  (ii, iii)

• D

  (ii, iv)