In a long staright solenoid with cross-sectional radius `a` and number of turns per unit length `n` a current varies with a constant velocity` dotI A//s`. Find the magntidue of the eddy current field strength as a function of the distance `r` from the solenoid axis. Draw the appoximate plot of this function.

A very long straight solenoid has a cross section radius R . A number of turns per unit length is equal to n . Find the magnetic induction at the centre of the coil when a current I flows thougth it.

A long straight solenoid has n turns per unit length. An alternating current I = I_(m) sin omega t flows throught it. Find the displacement current density as a function of the distnace r from the solenoid equals R .

A long solenoid has a radius a and number of turns per unit length is n . If it carries a current i, then the magnetic field on its axis is directly proportional to

A long solenoid has a radius a and number of turns per unit length is n . If it carries a current i, then the magnetic field on its axis is directly proportional to

A current I flows in a long single layer solenoid with cross-sectional radius R . The number of turns per unit length of the solenoid equals n . Find the limiting current at which the winding may ruputure if the tensile strength of the wire is equal to F_(l i m) .

A very long straight solenoid has a cross section radis R and n turns per unit lenghth. A direct current I flows throguh the solenoid. Suppose that x is the distance from the end of the the solenoid, measured along its axis. Find: (a) the magnetic induction B on the axis as a funciton of x , draw an approximate plot of B vs ratio x//R , (b) the distance x_(0) to the point on the axis at which the value of B differs by eta = 1% from that in the middle section of the solnoid.

A very long straight solenoid carries a current i . The cross-sectional area of the solenoid is equal to S , the number of turns per unit length is equal to n . Find the flux of the vector B through the end plane of the solenoid.

A solenoid with 7 turns per unit length is carrying a current of 2.5A . What is the magnetic intensity inside the solenoid ?