1. A soleniod is 1.0 m long and 3.0 cm in diameter. If it has 1000 turns and carries a current of 5A, find the B field at its center.
2. An ideal transformer's primary has 2000 turns and secondary has 50 turns. The primary is connected to a source of 120 V, the secondary is connected to resistance of 0.6 ohm. Find the current in the secondary.