Physics

Problem

Two wires X and Y have equal resistances at

0\,^{\circ}\text{C}

. Their temperature coefficients are

\alpha_X = 4.0\times10^{-3}\,^{\circ}\text{C}^{-1}

and

\alpha_Y = 2.0\times10^{-3}\,^{\circ}\text{C}^{-1}

. Which statement correctly compares their resistances at

100\,^{\circ}\text{C}

? a)

R_X = R_Y

R_X < R_Y

R_X > R_Y

d) Cannot be compared with the given data