A solenoid is to be designed to produce a uniform magnetic field of 0.01 T in its interior. The radius and the length of the solenoid are to be 4 cm and 80 cm, respectively. If the available wire can carry a maximum current of 10 A, find the minimum total length of wire required. (take μ = 4 x 10-7 T.m/A) a. O b. O C. 160 m 320 m O e. 40 m d. 80 m 100 m

55. A circular loop of wire 1.0 cm in radius carries a current of 30 A. The magnetic field at the center of the loop is a. 1.9 mT b. 2.4 mT C. 3.8 mT d. 12 µT e. 48 μ.

A 10-cm-radius, conducting, circular loop with 50 turns carries a current 0.80 A. What is the strength of the magnetic field at the center of the loop? O a. 250 µT O b.650 µT O c. 350 µT O d. 550 µT O e. 450 µT

So theres 2 long straight current-carrying wires are lined up parallel to one another at a distance ?d. Currents of 4 A and 2 A flow through the wires, both in the same direction generating the field of 9.2x10-6 T at a midpoint between them. Calculate the distance between the wires. Give your answer in SI units. Use ?0=4?×10−7μ0=4π×10−7 Hm-1.