A toroid is wound over a circular core. Radius of each turn is `r` and radius of toroid is `R (gt gt r)`. The coefficient of self-inductance of the toroid is given by

A toroid is wound over a circular core. Radius of each turn is r and radius of toroid is R(>>r). The Coefficient of self - inductance of the toroid is given by

A toroidal solenoid with air core has an average radius of 15cm, area of cross section 12cm^(2) and has 2000 turns. Calculate the self- inductance of the toroid. Assume the field to be uniform across the cross-section of the toroid.

A toroidal solenoid with an air core has an average radius of 15 cm, area of cross-section 12 cm^(2) and 1200 turns. Obtain the self inductance of the toroid. Ignore field variations across the cross-section of the toroid. (b) A second coil of 300 turns is wound closely on the toroid above. If the current in the primary coil is increased from zero to 2.0 A in 0.05 s, obtain the induced e.m.f. in the second coil.

Two concentric circular coils of radius r and R are placed coaxially with centres coinciding If R gt gt r then calculate the mutual inductance the coils.

Two concentric circular coils of radius r and R are placed coaxially with centres coinciding If R gt gt r then calculate the mutual inductance the coils.

A toroid of 1000 turns has an average radius of 10 cm and area of cross section 15 cm^(2) . Calculate the self-inductance of the toroid.