The variations of resistivity $\rho$ with absolute temperature T for three different materials $\mathrm{X}, \mathrm{Y}$ and Z are shown in the graph below. Identify the materials $\mathrm{X}, \mathrm{Y}$ and Z .

• A

  X - copper, Y - semiconductor, Z - nichrome
• B

  X - semiconductor, Y - nichrome, Z - copper
• C

  X - nichrome, Y - copper, Z - semiconductor
• Correct answer
  D

  X - copper, Y - nichrome, Z - semiconductor

Solution

X is copper, Y is nichrome, Z is semiconductor

Hence, the correct answer is option: 'D'.