the resistance of a matal wire of length 1m is 26 ohm at 26℃ . if the diameter of wire is 0.3mm, what will be the resistivity of metal at that temperature?
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Answered by
2
its resistivity will be 26
dipti15:
how
Answered by
1
R = pl/A
given,
R = 26 ohms
D = .3 mm = .0003 m
l = 1 m
Now
A = πD²/4
Now put the value of A , l and R in above relation and get the value of p called resistivity.
given,
R = 26 ohms
D = .3 mm = .0003 m
l = 1 m
Now
A = πD²/4
Now put the value of A , l and R in above relation and get the value of p called resistivity.
diameter??
dia is given .3 mm
convert it into m
.0003 m
ok thnx
then get cross sectional area of wire using relation A= πD²/4
Hope you get it
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