P27 025

background image

25. The resistance at operating temperature T is R = V /i = 2.9 V/0.30 A = 9.67 Ω. Thus, from R

− R

0

=

R

0

α(T

− T

0

), we find

T

=

T

0

+

1

α



R

R

0

1



=

20

C +



1

4.5

× 10

3

/K

 

9.67 Ω

1.1 Ω

1



which yields approximately 1900

C. Since a change in Celsius is equivalent to a change on the Kelvin

temperature scale, the value of α used in this calculation is not inconsistent with the other units involved.
Table 27-1 has been used.


Document Outline


Wyszukiwarka

Podobne podstrony:
025 odpowiedzialnosc cywilnaid 4009 ppt
P27 001
p03 025
P27 050
P27 017
P32 025
025 teatroterapia Dziobak
P27 063
P23 025
AB 4117 01 025
p40 025
p36 025
kierowaniedziaaniamiratowniczymiwarunkizaliczeniaor, ND P27 Warunki zaliczenia KIEROWANIE Lato 2011
P27 015
P27 047
Programmed repair Auxiliary heater Part C Models 124, 126 020 024 025
P27 054
025

więcej podobnych podstron