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Current Electricity question

2010 · Shift 0 · Q66

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JEE Main
Physics
Current Electricity
2010 · Shift 0 · Q66

Current Electricity question

2010 · Shift 0 · Q66

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1

Two conductors have the same resistance at

{0^ \circ }C

but their temperature coefficients of resistance are

{\alpha _1}

and

{\alpha _2}.

The respective temperature coefficients of their series and parallel combinations are nearly

A
${{{\alpha _1} + {\alpha _2}} \over 2},\,{\alpha _1} + {\alpha _2}$
B
${\alpha _1} + {\alpha _2},\,{{{\alpha _1} + {\alpha _2}} \over 2}$
C
${\alpha _1} + {\alpha _2},\,{{{\alpha _1}{\alpha _2}} \over {{\alpha _1} + {\alpha _2}}}$
D
${{{\alpha _1} + {\alpha _2}} \over 2},\,{{{\alpha _1} + {\alpha _2}} \over 2}$

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