The total number of turns for a toroid carrying current 100mA is.1500. If `10 xx 10^-2` m be the diameter of the toroid of length 0.5m, then find out the value of magnetic induction at the centre of the toroid.

The length of straight solenoid is 10 cm, number of turns is 5000 , current through it is 10 mA and the relative permeability of the material of its 1500. Determine the magnetic intensity H and the magnetic field B on the axis of the solenoid .

Two concentric but mutually perpendicular conduction coils are carrying current 3A and 4A, respectively . if the radius of each coil be 2pi,cm . What will be the magnetic induction at the centre of the coils ? (mu_(0)=4pixx10^(-7)Wb*A^(-1)m^(-1)) .

A straight wire is used ot form a semi-circular wire of radius 2cm. IF a current I=10A is passing through the wire,then find the magnitude and direction of magnetic induction at the centre of the semicircle.

An iron cored toroid has ring radius 7 cm number of turns 500 . If 2 A current is passed through the wire , what will be the value of magnetic permeability of iron = 1500 .

In a compact coil of 50 turns, the current strength is 10 A and the radius of the coil is 25xx10^(-2)m . Find the magnitude of the magnetic field at its centre.

In a compact coil of 50 turns, the current strength is 10A and the radius of the coil is 25xx10^2 meter. Find the magnitude of the magnetic field at its centre.

The radius of toroid is 0.2 m and the number of turns in it is 1000. If 100 mA current passes through the toroid, determine the magnetic field at any point on its axis.

If 10^m divides the number 101^(100)-1 then, find the greatest value of mdot

A circular coil of 100 turns and of radius 4 cm carries a current of 0.5 A. Find out the magnetic field at the centre of this coil. What will be the percentage fall of this magnetic field at a point on the axis, 3 cm away from the centre?