Q45:It is desired to construct a solenoid that will have a resistance of V (at 20.08C) and produce a mag- netic field of T at its center when it carries a current of A. The solenoid is to be constructed from copper wire having a diameter of mm. If the radius of the solenoid is to be cm, determine
(a) the number of turns of wire needed and
(b) the required length of the solenoid.
p =
pi =
g =
u =