Atividade 2 Resposta

Rf Ri 1 alpha Delta Theta Rf resistencia final Re resistencia inicial Delta Theta Thetaf Thetai Variación temperatura alpha coeficiente temperatura p metros approx 0004 C1 Re rho 0030 aluminio 28 imes 108 l 2750 m S 28 mm de diametro raio 14 mm S pi R2 pi 142 S 31416 imes 196 615 mm2 615 imes 106 m2 Re fracrho lS frac28 imes 108 imes 2750615 imes 106 Re 252 Omega Rf Ri 1 alpha Delta Theta Rf 1252 1 0004 6 0 48 Rf 1252 1 0004 16 Rf 1252 1064 Rf 1332 Omega E q Delta V E 60 0008 E 048 j w QV w 600008 048 j b E fracq Delta V9 q E 70 J 8C Delta V 9 w QV Q frac70 J8C v frac709 Q w 7c8 70 J Delta V 9 4 9V 2 R 220 Omega i56 mA V V Ri 220 00056 139V d i 15 mA 00015 A V 24 V fracRiV24 16 000Omega i 28 233A g i 42 A V 120 V fracRiVi frac1204 28657 Omega