A solenoid of lenght 30 cm with 10 turns per centimetre and area of cross-section `40cm^(2)` completely surrounds another co-axial solenoid of same length, area of cross-section `20cm^(2)` with 40 turns per centimetre. The mutual inductance of the system is

A solenoid of length 50cm with 20 turns per centimetre and area of cross-section 40cm? completely surrounds another coaxial solenoid of the same length, area of cross-section 25cm^(2) with 25 turns per centimetre. Calculate the mutual inductance of the system.

A solenoid of length 50 cm with 20 turns per cm and area of cross section 40 cm^(2) comletely surrounds another co-axial solenoid of the same length, area of cross seciton 25 cm^(2) with 25 turns per cm. Calculate the mutual inductance of the system.

A solenoid of length 60 cm with 25 turns per cm and area of cross section 50 cm^(2) completely surrounds another solenoid, placed coaxially with it, of same length, area of cross section 30 cm^(2) with 15 turns per cm. What will be the mutual inductance of the system?

The inductance of a solenoid 0.5m long of cross-sectional area 20cm^(2) and with 500 turns is

The self inductance of a solenoid of length L, area of cross-section A and having N turns is-