A solenoid consists of N = 130 turns of wire in a coil of length d = 5 cm and cross-sectional area A = 2 cm2. Assume that the magnetic field is uniform inside the solenoid and ignore end effects. Write an equation for the magnetic field B produced by the solenoid. Express the answer in terms of the current through the coil I, the number of turns N, length of the coil d, and the permeability of free space μ0.
Using the equation for the magnetic field determined, calculate the magnetic flux, in webers, through a single loop of the solenoid with a current of I = 2.9 A. The coil is d = 5 cm long and has a cross-sectional area of A = 2 cm2 and consists of N = 130 turns.
The self inductance relates the magnetic flux linkage to the current through the coil. Calculate the self inductance L in units of μH. The coil is d = 5 cm long and has a cross-sectional area of A = 2 cm2 and consists of N = 130 turns.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

higher potential

explanation:

because it is in a high speed so it must move into a of high potential