A metal wire of length 1 m and resistance 26 ohm has a diameter of 0.3 mm. Its resistivity closely matches which metal (using standard NCERT resistivity table)?
Question
A metal wire of length 1 m and resistance 26 ohm has a diameter of 0.3 mm. Its resistivity closely matches which metal (using standard NCERT resistivity table)?
Copper
Manganese
Tungsten
Aluminium
Answer
Manganese
Detailed Explanation
Calculating r = RA/l for these values gives approximately 1.84 x 10^-6 ohm-metre, matching manganese's resistivity.