Apoint charge q is located in vacuum at (d, 0, 0), a distance d from the yz plane that is the surface of a homogeneous dielectric with dielectric constant ke occupying all space to the left of this plane, that is, for all negative values of x. find: (a) the surface charge density of bound charges as a function of a distance r from the point charge q; (b) the total bound charge on the surface of the semiconductor

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: