In ancient times, naturally occurring magnets were called lodestones. These magnetic rocks, primarily composed of magnetite, were among the first materials used to study and understand magnetic properties and were crucial in early navigation.
Tiwari Academy Discussion Latest Questions
No, all parts of a magnet do not attract magnetic materials equally. The poles, where the magnetic field is strongest, attract materials more effectively, while the areas between the poles have weaker magnetic attraction.
No, iron filings do not stick uniformly across the entire surface of a magnet. They accumulate more densely at the poles, where the magnetic field is strongest, creating a visible pattern of attraction.
In a speaker, the magnet generates a stable magnetic field that interacts with an electric current in the coil. This interaction causes the coil to move, driving the speaker cone and producing sound waves.
To make a magnetic compass, magnetize a needle by rubbing it with a magnet, then float the needle on a small piece of cork or paper in water. It will align itself with Earth’s magnetic field.
Yes, the compass needle will show similar behavior when a magnet is brought closer. As a magnet itself, the needle will align with the external magnetic field, showing attraction or repulsion depending on the poles.
Placing a piece of wood between the compass needle and the magnet will not affect the compass needle’s deflection. Wood is non-magnetic and does not interfere with the magnetic field or the compass needle.
Different magnets lift varying numbers of pins due to differences in their magnetic strength, size, and material composition. Stronger magnets have a more intense magnetic field, enabling them to attract and hold more pins.
To prevent screws from falling, the mechanic can magnetize the screwdriver by rubbing it against a magnet several times in one direction. The magnetized screwdriver will then attract the steel screws, holding them in place.
Yes, the compass needle’s north pole points towards the Earth’s geographic north, indicating that the Earth’s magnetic south pole is near the geographic north. Thus, the Earth’s magnetic north pole is near the geographic south.