Current Electricity

JEE Main level, single correct, medium

87 of 380

Question 87 of 380

The resistance of a wire is 5 ohm5 \mathrm{~ohm} at 50∘C50^{\circ} \mathrm{C} and 6 ohm6 \mathrm{~ohm} at 100∘C100^{\circ} \mathrm{C}. The resistance of the wire at 0∘C0^{\circ} \mathrm{C} will be

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Answer: (C) 4 ohm4 \mathrm{~ohm}

56=1+50α1+100α\frac{5}{6}=\frac{1+50 \alpha}{1+100 \alpha}
5=R0(1+α×50)5=R_0(1+\alpha \times 50)
R0=4R_0=4

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