Magnetism and Electromagnetism Test

What happens when two like magnetic poles are brought together?

• They attract
• They repel
• They neutralize each other
• They create a uniform magnetic field

Which of the following is NOT a magnetic material?

• Iron
• Nickel
• Aluminum
• Cobalt

What characterizes a magnetically soft material?

• It retains magnetism permanently
• It is temporarily magnetic
• It cannot be magnetized
• It has only one magnetic pole

In a magnetic field, what do the field lines represent?

• The direction of electric current
• The strength of gravity
• The path a magnetic object would follow
• The temperature gradient

Where is the magnetic field strongest around a bar magnet?

• At the center
• Near the poles
• Equally strong everywhere
• Furthest from the magnet

What happens to magnetic field strength as you move away from a magnet?

• It increases
• It remains constant
• It decreases
• It fluctuates randomly

What is the relationship between electric current and magnetic field?

• Electric current has no effect on magnetic fields
• Electric current weakens magnetic fields
• Electric current creates magnetic fields
• Magnetic fields create electric current

What does the Right-Hand Grip Rule determine?

• The strength of a magnetic field
• The direction of magnetic field lines around a current-carrying wire
• The polarity of a magnet
• The speed of electromagnetic waves

Which component is NOT typically found in an electromagnet?

• Coil of wire
• Soft iron core
• Power source
• Permanent magnet

What factor does NOT affect the strength of an electromagnet?

• Number of coil turns
• Current magnitude
• Core material
• Temperature of the surroundings