The electrical resistivity of three materials A, B, and C at 20°C is given below:
Material A: Resistivity \(10^{17} \Omega \, {m}\)
Material B: Resistivity \(44 \times 10^{-6} \Omega \, {m}\)
Material C: Resistivity \(1.62 \times 10^{-8} \Omega \, {m}\)
(i) Classify these materials as conductor, alloy, and insulator.
(ii) Give one example of each of these materials and state one use of each material in the design of an electrical appliance, say an electric stove or an electric iron.