1. Find the magnetic field at 0.350 m from a long wire carrying a current of 3.00 A.
2. Find the current in a wire if the magnetic field is 3.50 x 10–6 T at a distance of 2.50 m from the wire.
3. A solenoid has 1000 turns of wire, is 0.320 m long, and carries a current of 5.00 A. What is the magnetic field at the center of the solenoid? Assume that its length is long in comparison with its diameter.
4. A solenoid has 3000 turns of wire and is 0.350 m long. What current is required to produce a magnetic field of 0.100 T at the center of the solenoid? Assume that its length is long in comparison with its diameter.
5. A small solenoid is 0.150 m in length and 0.0150 m in diameter, and has 600 turns of wire. What current is required to produce a magnetic field of 1.25 x 10–3 T at the center of the solenoid?