The resistance of platinum wire at \(0^\circ\)C is \(2\,\Omega\) and \(6.8\,\Omega\) at \(80^\circ\)C. The temperature coefficient of resistance of the wire is :
Resistivity, conductivity and temperature dependence of resistance
Every question from past board papers on Resistivity, conductivity and temperature dependence of resistance, newest paper first. Open any question for its full worked answer.
NEET UG 2023 question paper (official, booklet G6)
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As the temperature increases, the electrical resistance :
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A copper wire of length 10 m and radius \((10^{-2}/\sqrt{\pi})\) m has electrical resistance of \(10\,\Omega\). The current density in the wire for an electric field strength of 10 (V/m) is :
NEET UG 2020 question paper (official, booklet E1)
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The solids which have the negative temperature coefficient of resistance are :
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Which of the following graph represents the variation of resistivity (\(\rho\)) with temperature (T) for copper ?
NEET UG 2018 question paper (official, booklet EE)
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A carbon resistor of \((47\pm4.7)\) k\(\Omega\) is to be marked with rings of different colours for its identification. The colour code sequence will be
NEET UG 2017 question paper (official, booklet B)
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The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be :