Derivation of Ohm's Law NCERT Exercise Based MCQs Current Electricity Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

1.	Alloys of metals usually have less resistivity than that of their constituent metals.
2.	Alloys usually have much higher temperature coefficients of resistance than pure metals.
3.	The resistivity of the alloy manganin is nearly independent with an increase of temperature.
4.	The resistivity of a typical insulator (e.g., amber) is less than that of a metal by a factor of the order of 10 22 / 10 23 .

1.	\(1\times 10^{-7}~\Omega\text{m}\)	2.	\(2\times 10^{-7}~\Omega\text{m}\)
3.	\(3\times 10^{-7}~\Omega\text{m}\)	4.	\(1.6\times 10^{-7}~\Omega\text{m}\)