Answer: Domed or gripped heads are sometimes preferred over flat heads as dropped flat-headed pins may easily point upward, posing a hazard. Drawing pins also pose a hazard of ingestion and choking, where they may do serious harm.

Answer: because the pointed lower end is use to exert more pressure on surface as pressure is inversely proportional to area.

When the drawing pin is pushed into the board with the thumb, the applied force is spread out over head of the pin. As the pressure experienced is small, the thumb does not get hurt. The same force, however acts at the tiny area of the pin point. The resulting high pressure forces the pin into the board.

Ans: Safety pins & drawing pins have narrow & sharp tips because the smaller surface area of the tip causes a high pressure and therefore, makes it easier for these objects to pierce through a given material.

Answer: one end of a drawing pin is sharp in order to increase pressure on the surface where the pin is to be inserted . So, that it easily pierce because smaller the area more the pressure will be exerted .

one end of drawing pin is kept sharp so that it can Pierce the drawing board as more pressure will be applied since pressure is inversely proportional to area.

Thumbtacks were historically used by draftsmen for the purpose of attaching paper to a drawing board, hence the name ‘drawing pin’. Thumbtacks come in a variety of sizes, colours and shapes, that are often used for different purposes, such as in art or as markers, and they are generally considered as stationery items.

Steel pins stick to magnets. A magnet attracts the steel pin. When the pin touches the magnet it can’t attract it any closer and it sticks to the magnet. These magnets often have plastic or other materials such as ceramics as part of the object.

A magnet is an object that can pull certain types of metal toward itself (attract), or push those metals away (repel). Magnetism can work over a distance, meaning that a magnet does not have to be touching an object to attract it or repel it.

When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).

The force depends on the distance between the magnets. The farther apart the magnets are, the weaker the force. When the magnets are touching one another, at distance = 0, the force will be approximately equal to the magnet’s listed Pull Force, Case 1.

Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few ‘magnetic’ metals and not all matter.

north pole

Take two magnets put one North pole and one South pole on the middle of the iron. Draw them towards its ends, repeating the process several times. Take a steel bar, hold it vertically, and strike the end several times with a hammer, and it will become a permanent magnet.

Q. The strongest part of a magnet is… the bars.

Each one reinforces the magnetic fields of the others. Each one has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces.

electromagnet

A magnetic field is the region around a magnet where a force acts on another magnet or on a magnetic material.