What is the Magnetic Field strength outside a toroid ?

A toroid has a core (non ferromagnetic material) of inner radius 25cm and outer radius 26cm around which 3500 turns of wire are wound. If the current in the wire is 11A , what is the magnetic field (a) outside the toroid (b) inside the core of the toroid (c) in the empty space surrounded by the toroid?

A toroid with mean radius r_(0) , diameter 2a have N turns carrying current l. What is the magnetic field B inside the the toroid?

What is net magnetic field at point O?

For toroid of mean radius 20 cm, turns = 240 and a current of 2A. What is the value of magnetic field within toroid ?

In the figure, what is the magnetic field at the point O ?

In the figure, what is the magnetic field at the point O ?

Which of the following materials would weaken the magnetic field strength at a point if introduced ?

In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 0*26G and dip angle is 60^@ . What is the magnetic field of earth at this location?

In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 0*26G and dip angle is 60^@ . What is the magnetic field of earth at this location?

Which of these materials requires the least value of magnetic field strength to magnetize it ?