Question

pros and cons of magnetic force

Answer 1

Answer:

Neodymium

Some of its most common uses: Due to neodymium’s incredible strength, these magnets are used in applications like magnetic resonance imaging (MRI), lifting machinery, levitation devices, jewelery, bearings, audio equipment, and hard disc drives.

Advantages of neodymium magnets:

Best power to weight ratio of all magnets

High resistance to demagnetization

Often the most cost-effective choice

Disadvantages of neodymium magnets:

Magnetism starts to decrease (and can be permanently lost) at 80°C*

Low corrosion resistance (if the plating is damaged)

Brittle (may break, crack, or chip upon sudden collisions with other magnets or metals)

*Note: Different neodymium blends (like N-30EH and N-28EH) can allow these magnets to withstand higher temperatures, but that temperature resistance comes with lower magnetic strength and higher prices.

Aluminum-Nickel-Cobalt (Alnico)

Some of its most common uses: Very popular in audio applications, you’ll find these magnets in guitar pickups, microphones, electric motors, sensors, and bearings.

Advantages of alnico magnets:

High corrosion resistance

High physical strength (do not chip, crack, or break easily)

High temperature resistance (up to 540°C)

Disadvantages of alnico magnets:

They can easily be demagnetized (horseshoe magnets need to be stored with a keeper to ensure the magnetic field continues to flow around the magnet itself)

Weaker magnetic pull.