Engineering Science (Physics)
posted by Xyler .
A platinum coil has a resistance of 3.146(ohms) at 40'C and 3.767(ohms) at 100'C. Find the resistance and the temperature coefficient of resistance at 0'C. Thanks in anticipation

Engineering Science (Physics) 
Henry
A. R = Ro + a(TTo)Ro.
3.146 + a(10040)3.146 = 3.767.
3.146 + 188.8a = 3.767.
188.8a = 3.767  3.146 = 0.621.
a = 0.621 / 188.8 = 0.003289. = Temp, coerfficient.
B. R = 3.146 + 0.003289(040)3.146.
R = 3.146  0.4139=2.732 Ohms @ o Deg. 
Engineering Science (Physics) 
Xyler
Thanx Henry I really appreciate ur effort soo much.. May God Bless U..
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