Solenoids & electromagnets

Consider the 800-turn solenoid shown in the diagram below.

What is the current in the windings that would produce a magnetic field of 0.060T at the center of the solenoid?
1. 3.0A
2. 8.0 A
3. 18 A
4. 290 A
Identify the magnetic field poles 1 and 2 of the current-carrying solenoid in the diagram below.
Which of the four arrows indicates the direction of the magnetic field when current flows in the solenoid shown below?
1. W
2. X
3. Y
4. Z
A coil of copper wire is wrapped around a compass as shown. Which way will the compass needle point when current flows through the coil?
1. W
2. X
3. Y
4. Z
A current of 4.3 A flows through a solenoid. The 620-turn solenoid is 14 cm long and has a 3.5 cm diameter.

What are the direction and magnitude of the magnetic field inside the solenoid?