Manali: Himachal Pardesh

http://electrical-engineering-portal.com/glossary-of-power-transformer-terms

http://www.electrical4u.com/working-of-electric-motor/

Resistivity, Temperature Coefficient of Resistance and Inferred Zero Resistance Temperature

Materials	Resistivity in μ Ω-cm at 20oC	Temperature Coefficient of Resistance in Ω per oC at 20oC	Inferred Zerro Resistance Temperature in oC
Aluminium	2.82	0.0039	− 236
Brass	6 to 8	0.0020	− 480
Carbon	3k to 7k	0.00005
Constantan	49	0.000008	− 125000
Copper	1.72	0.00393	− 234.5
Gold	2.44	0.0034	− 274
Iron	12.0	0.005	− 180
Lead	22.0	0.0039	− 236
Manganin	42 to 74	0.00003	− 236
Mercury	96	0.00089	− 1100
Nickel	7.8	0.006	− 147
Silver	1.6	0.0038	− 310
Tungsten	5.51	0.0045	− 200
Zinc	6.3	0.004	− 230