Two wires X and Y have equal resistances at

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

Two wires X and Y have equal resistances at 0 ∘C0\,^{\circ}\text{C}. Their temperature coefficients are αX=4.0×10−3 ∘C−1\alpha_X = 4.0\times10^{-3}\,^{\circ}\text{C}^{-1} and αY=2.0×10−3 ∘C−1\alpha_Y = 2.0\times10^{-3}\,^{\circ}\text{C}^{-1}. Which statement correctly compares their resistances at 100 ∘C100\,^{\circ}\text{C}? (a) RX=RYR_X = R_Y (b) RX<RYR_X < R_Y (c) RX>RYR_X > R_Y (d) Cannot be compared with the given data

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