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Half of the core of a solenoid of 2xx...

Half of the core of a solenoid of `2xx 10^(-3) m^(2)` cross -section , is made up of air and the other half iron `(mu_(r)=500)`. The length of the solenoid is 2 m . If the number of turns is 1000, calculate its coefficient of self induction .

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The correct Answer is:
0.315 H
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