Current flows from …

• positive to negative
• negative to positve
• either

Electrons flow from …

• negative to positive
• positive to negative
• either

Magnetic field lines go from …

• north to south
• south to north
• either
• both

Steel is magnetic

• Sometimes
• Always
• Never

Copper is magnetic

• Never
• Sometimes
• Always

Zinc is magnetic

• Never
• Sometimes
• Always

Nickel is magnetic

• Always
• Sometimes
• Never

How do you know a magnetic field is uniform?

What is required to produce an electromagnet?

• insulated wire
• soft iron core
• coil of insulated wire and soft iron core
• coil of insulated wire

Which makes the strongest electromagnet?

• coil of insulated wire and soft iron core
• insulated wire
• coil of insulated wire