An air core solenoid has 1000 turns and is one metre long. Its cross-sectional area is 10 cm2. Its self inductance is

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0.1256 mH

12.56 mH

1.256 mH

125.6 mH

answer is C.

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Detailed Solution

L=μ0N2Al=4π×10−7×(1000)2×10×10−41=1.256 mH

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