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 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 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.

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 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