Resistance of a wire at 
C is 20
and at 
C is 60
. At what temperature its resistance is 25
?
a)
b)
c)
d)
Resistance of a wire at C is 20 and at C is 60 . At what temperature its resistance is 25 ?
a)
b)
c)
d)
Question ID - 151561 | SaraNextGen Top Answer
Resistance of a wire at C is 20 and at C is 60 . At what temperature its resistance is 25 ?
a)
b)
c)
d)
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Resistance of a wire at |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (d) -
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(d) Here,
Where
Dividing Eq. (ii) by Eq. (i), we get
Again,
Dividing Eq. (iv) by Eq (iii), we get
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is the temperature coefficient of resistance.
127 votes
Answer Link
127