Magnetism Flashcards
When do magnets attract each other, and when do they repel?
Magnets attract when opposite poles face each other and repel when similar poles face each other. Opposite poles attract due to the alignment of magnetic domains, while similar poles repel for the same reason.
What is the difference between magnetically hard and magnetically soft materials?
Magnetically hard materials retain a strong magnetic field, while magnetically soft materials can be easily magnetized and demagnetized. Hard materials have strong magnetic domains that resist changes, while soft materials have flexible domains allowing easy magnetization changes.
What term is used to describe the imaginary lines representing the direction of a magnetic field?
Magnetic Field Lines. Magnetic field lines are imaginary lines that indicate the direction of the magnetic field, going from the north pole to the south pole outside the magnet.
When does magnetism get induced in some materials?
Magnetism is induced in some materials when they are placed in a magnetic field. Some materials become temporarily magnetic when exposed to an external magnetic field, aligning their magnetic domains.
How would you investigate the magnetic field pattern for a permanent bar magnet?
By observing how iron filings align around the permanent bar magnet. Iron filings align along the magnetic field lines, providing a visual representation of the magnet’s field.
How can you use two permanent magnets to produce a uniform magnetic field pattern?
By arranging them carefully to ensure an even and consistent magnetic field between them. Proper arrangement ensures that the magnetic fields of the two magnets combine to create a uniform pattern.
