Investigate Current and Magnetic Fields Practice Test

A solenoid (coil of insulated wire) is connected to a variable DC power supply to investigate how current creates a magnetic field like a bar magnet. When current flows, the solenoid produces a magnetic field along its axis. If the current through the solenoid is increased from $0.5,\text{A}$ to $1.5,\text{A}$ while the number of turns stays the same, what happens to the solenoid’s magnetic field strength (qualitatively)?

A long straight vertical wire passes through a hole in a table. Conventional current $I=2.0,\text{A}$ flows upward (out of the table). A small compass is placed on the table 5 cm east (to the right) of the wire to investigate the magnetic field produced by the current. In which direction does the magnetic field $\vec{B}$ from the wire point at the compass location (ignoring Earth’s field)?