If the resistance of a conductor is 5,Omega,, at ,50,^oC and 7, Omega, at ,100,^oC then the mean temperature coefficient of resistance of the material

Q: If the resistance of a conductor is $5\,\Omega\,\,$ at $\,50\,^oC$ and $7\, \Omega\,$ at $\,100\,^oC$ then the mean temperature coefficient of resistance of the material is ............... $^oC$

a Using ${R_{{T_2}}} = {R_{{T_1}}}[1 + \alpha ({T_2} - {T_1})]$ $ \Rightarrow $ ${R_{100}} = {R_{50}}[1 + \alpha (100 - 50)]$ $ \Rightarrow $ $7 = 5\,[1 + (\alpha \times 50)]$ $ \Rightarrow $ $ \propto \, = \,\frac{{(7 - 5)}}{{250}} = 0.008\,{^o}C$

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

If the resistance of a conductor is $5\,\Omega\,\,$ at $\,50\,^oC$ and $7\, \Omega\,$ at $\,100\,^oC$ then the mean temperature coefficient of resistance of the material is ............... $^oC$

A$0.008$
B$0.006$
C$0.004$
D$0.001$

Medium

STD 11 Science
NEET
STD 12 - 3. current electricity
Physics

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