A heater element is made of nichrome wire having resistivity equal to 100 × 10-8 Ωm and a diameter of 0.4 mm. The length of the wire required to get a resistance of 40 Ω will be nearly

A heater element is made of nichrome wire having resistivity equal to

1.	A heater element is made of nichrome wire having resistivity equal to 100 × 10-8 Ωm and a 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
D.	3 m
Answer» D. 3 m

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A heater element is made of nichrome wire having resistivity equal to 100 × 10-8 Ωm and a diameter of 0.4 mm. The length of the wire required to get a resistance of 40 Ω will be nearly

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