a.) A long straight wire carries a 2.00-A current. What is the magnetic field 5.0 cm from this wire? μ0 = 4π x 10-7 Tm / A
b.) Suppose the wire is cut and fashioned into a single circular current loop 10.0 cm in diameter carries a 2.00-A current. What is the magnetic field at the center of this loop?
c.) Suppose that 1000 of these loops are connected in series within a 500 cm length to make a solenoid 500 cm long. What is the magnetic field at the center of this solenoid?
d.) Is it 1000 times the field at the center of the single loop? Explain why or why not.
e.) Two identical parallel wires that carry currents of 8 A and 12 A respectively in opposite directions are separated by a distance of 5 cm. Calculate the force per unit length on the wires. Is the force attractive or repulsive?