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Two coaxial solenoids are made by windin...

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area ` 10cm^2 `and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual inductance is

A

`2.4 pi xx 10^-5H`

B

`4.8 pi xx 10^-5H`

C

`2.4 pi xx 10^-4H`

D

`4.8 pi xx 10^-4H`

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MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
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