A copper wire 20.0 m long with radius 4.57 x 103 m and = 1.72 x 108 cm is used to form a

A copper wire 20.0 m long with radius 4.57 x 10–3 m and ρ = 1.72 x 10–8 Ω cm is used to form a solenoid that will produce a magnetic field.

(a) What is the wire’s resistance?

(b) If the wire is connected to a 4.50-V battery, what is the current that passes through the wire?

(c) If the solenoid is designed to have an internal radius of 3.25 cm, how many single-layer coils will be produced?

(d) What will be the length of the solenoid if the coils touch one another?

(e) Find the strength of the solenoid’s magnetic field.