R2/R1=2 t2=250 t1=0 α=?
R2=Ro(1+α*t2) R1=Ro(1+α*t1)
R2/R1=(1+α*t2)/(1+α*t1) α=1/(t2-t1)=1/250=4*10^*3
R2/R1=2 t2=250 t1=0 α=?
R2=Ro(1+α*t2) R1=Ro(1+α*t1)
R2/R1=(1+α*t2)/(1+α*t1) α=1/(t2-t1)=1/250=4*10^*3