Q307
A heater element is made of nichrome wire having resistivity equal to 100 × 10-8 Ωm and diameter of 0.4 mm. The length of the wire required to get a resistance of 40 Ω will be nearly
A.
9 m
B.
7 m
C.
5 m
AnswerD.
3 m
Answer: Option C
Solution
Answer: Option C
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