A toroidal solenoid with an air core has an average radius of 15 cm , area of cross-section `12 cm^(2)` and 1200 turns . Ignoring the field variation across the cross-section of the toroid the self-inductance of the toroid .

An air core solenoid of 80 cm length has 500 turns and its circular cross-section has a diameter of 2 cm, calculate the self inductance of the solenoid?

Calculate the conductivity of a wire of length 200 cm, area of cross-section 2cm^2 and of resistane 5xx10^4Omega .

A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A, what is the magnetic field inside the core of the toroid.

A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A, what is the magnetic field outside the toroid.

An air-cored solenoid is of length 0.3 m area of cross-section 1.2 xx 10^-3m^2 and has 2500 turns. Around tis central section, a coil of 350 turns is wound. The soelnoid and the coil are electrically insulated from each other. Calculate the e.m.f. induced in the coil , if the intial current of 3 A in the solenoid is reversed in 0.25 s.

A toroid has a core of inner radius 20cm and outer radius 22cm around which 4200 turns of a wire are wound. If the current in the wire is 10A, what is the magnetic field inside the core of toroid.

A toroid has a core of inner radius 20cm and outer radius 22cm around which 4200 turns of a wire are wound. If the current in the wire is 10A, what is the magnetic field outside the toroid.