The resistance of a resistor is calculated as, Rt=R0(1+αt) Resistance of resistor at temperature t1=40∘C is given by Rt1‌‌=R0(1+αt1) 100‌‌=R0(1+(2×10−4×40)) R0‌‌=‌
100
1.008
‌‌=99.21Ω Now, the current drops to 0.098A at temperature t2 Rt2‌‌=‌
V
I
‌‌=‌
10
0.098
‌‌=102.04Ω Resistance of resistor at temperature t2 is given by, Rt2=R0(1+αt2) 102.04‌‌=99.21(1+(2×10−4t2)) t2‌‌=‌