question_answer

The resistivity of alloys \[={{R}_{\text{alloy}}}\]; the resistivity of constituent metals \[{{R}_{\text{metal}}}\]. Then, usually                                                        [KCET 1994]

A)            \[{{R}_{\text{alloy}}}={{R}_{\text{metal}}}\]

B)                    \[{{R}_{\text{alloy}}}<{{R}_{\text{metal}}}\]

C)                    There is no simple relation between \[{{R}_{\text{alloy}}}\] and \[{{R}_{\text{metal}}}\]

D)                    \[{{R}_{\text{alloy}}}>{{R}_{\text{metal}}}\]