What is a toroid?

What does a toroid consist of ? Find out the expression for the magnetic field inside a toriod for N turns of the coil having an average radius r and carrying current I. show that the magnetic field in the open space inside and outside the torroid is zero.

What is a tissue? What are its kinds?

What is torsion? What is its effect?

Using Ampere's circuital law, derive an expression for the magnetic field along the axis of a toroidal solenoid.

What is haemozoin and what is its effect?

What is food? What is holozoic nutrition?

(a) What is calcination ? (b) What is roasting?