Magnetism and Electromagnetism Comprehensive Quiz

What happens when two magnets with the same pole are brought close together?

• They attract strongly
• They repel each other
• They remain neutral
• They merge into one magnet

Which of the following is an example of a magnetically hard material?

• Iron
• Aluminum
• Steel
• Plastic

In a magnetic field, field lines always:

• Cross each other
• Point randomly
• Go from North to South pole
• Curve unpredictably

What determines the strength of a magnetic field?

• Distance between field lines
• Color of the magnet
• Weight of the magnet
• Magnetic pole size

Which materials are NOT attracted to magnets?

• Iron
• Nickel
• Wood
• Cobalt

In the Right-Hand Grip Rule, what does the thumb represent?

• Magnetic field direction
• Current direction
• Force direction
• Pole orientation

What component is crucial in creating an electromagnet?

• Plastic core
• Wooden coil
• Wire coil
• Rubber insulation

What increases the strength of an electromagnet?

• Decreasing wire turns
• Reducing current
• Increasing current
• Using non-magnetic core

In a DC motor, what helps reverse the current direction?

• Brushes
• Permanent magnets
• Split-ring commutator
• Iron core

What factor does NOT increase induced voltage in electromagnetic induction?

• Stronger magnetic field
• Faster movement
• Shorter wire
• More coil turns