Toroid - Practice Questions & MCQ

Average radius of toroid made on ring of non-magnetic material is $0.1\mathrm{m}$ it has 500 turns. If it carries 0.5 A current, then the magnetic field produced along its circular axis inside the toroid will be:

A toroidal solenoid has 3000 turns and a mean radius of 10 cm. It has a soft iron core of relative permeability 2000. What is the magnitude of the magnetic field in the core when a current of 1 A is passed through the solenoid?

A loosely wound helix made of stiff wire is mounted vertically with the lower end just touching a dish of mercury. When a current from the battery is started in the coil through the mercury :

A toroid of mean radius ' a ', cross-section radius ' r ' and a total number of turns N. it carries a current ' i '. The torque experienced by the toroid if a uniform magnetic field of strength  B  is applied.
 

A toroid having 1000 turns per meter and carrying a current 5 A the value of the magnetic field at point inside is $p{\mu }_0\times {10}^3$ then the value of p is

For a toroid having n turns per unit length and carrying current i, the value of the magnetic field at the point inside the toroid is 

Direction:  In the following question, a statement of Assertion (A)  is followed by a statement of reason (R). Mark the correct choice as: 

Assertion: For a toroid, the magnetic moment is zero.

Reason: The magnetic field outside the volume of the current current-carrying toroid is zero.

A toroid of n turns, mean radius R and cross-sectional radius a carry current I. It is placed on a horizontal table taken as an x-y plane. Its magnetic moment m.