Two coaxial solenoids are made by windin...

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

`2.4pixx10^(-4)H`

`2.4pixx10^(-5)H`

`4.8pixx10^(-4)H`

`4.8pixx10^(-5)H`

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