1. A solenoid has 2500 turns of wire and is 0.200 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.
2. A long solenoid has 1000 turns and is 0.250 m long. If the wire carries a current of 2.50 A. what is the strength of the magnetic field at its center?
3. A small solenoid 0.100 m in length has 1000 turns of wire. What current is required to produce a magnetic field of 1.30 x 10–3 T at the center of the solenoid?
4. An auto mechanic wants to use a solenoid she found on a car starter. If the solenoid is 0.150 m in length and has 750 turns of wire, what current is required to produce a magnetic field of 1.50 x 10-3 T at its center?
5. An earthmover requires a solenoid with 2500 turns and whose length is 0.150 m. What current is required to produce a magnetic field of 0.100 T at the center of the solenoid?