# What are 5 examples of magnets?

• (i). Compass.
• (ii). MRI Scanners.
• (iii). Electric Motor.
• (iv). Speakers.
• (v). Refrigerators.
• (vi). Computer.
• (vii). Microwave.
• (viii). Cars.

## What are 3 examples of magnets?

Permanent magnets are commonly made from ceramic, alnico, and neodymium. Ceramic magnets are strong, and work well for most experiments. Alnico magnets are stronger and more expensive, and work very well for science experiments. Neodymium magnets are the strongest and most expensive of the three.

## How do you solve a magnetic field problem?

Solution: The magnitude of the magnetic force on a single charge moving at speed of $v$ in a uniform magnetic field of $B$ is determined by the formula $F=qvB\sin \theta$ where $\theta$ is the angle between velocity and magnetic field.

## What are the 10 uses of magnet?

• Secure a trash bag.
• Hold pins while sewing.
• Corral paper clips.
• Stick up kids’ cups.
• Fix a drafty door.
• Store aluminum foil and plastic wrap on the fridge.

## What are 2 examples of magnetism?

Magnetic poles always exist in pairs. Examples of magnetic substances include iron, nickel, cobalt, stainless steel, and many rare earth metals. Diamagnetic materials like copper and gold are weakly repelled by a magnetic field. Paramagnetic materials like calcium and aluminum are weakly attracted by a magnetic field.

## What is the example of using magnet?

Televisions, computers and microwave ovens all operate with magnets. Magnets are used to keep refrigerator doors closed and are even mounted on trucks that clean roads. You’ll also find magnets in medical devices to create a magnetic picture, in trains, and in the systems used to slow down roller coasters.

## What are the 4 types of magnetic?

• Diamagnetism.
• Paramagnetism.
• Ferromagnetism.
• Ferrimagnetism.
• Antiferromagnetism.

## What is the formula of magnet?

Magnetite is a mineral and one of the most significant iron ores, with the chemical formula Fe3O4 . It is a ferrimagnetic iron oxide that is attracted to magnets and may be magnetized to form a permanent magnet. With the chemical formula Fe3O4 , magnetite is a mineral and one of the most important iron ores.

## How do you calculate the magnetic force between two magnets?

The attractive and repulsive magnetic forces follow the empirical formula: F=K*∫B1dS1*∫B2dS2rn.

## How do you calculate magnetic force?

The magnitude of the force on a wire carrying current I with length L in a magnetic field is given by the equation. F=ILBsinθ where θ is the angle between the wire and the magnetic field. The force is perpendicular to the field and the current.

## How do you calculate the magnetic force of a wire?

The magnetic force on a current-carrying wire in a magnetic field is given by →F=I→l×→B. For part a, since the current and magnetic field are perpendicular in this problem, we can simplify the formula to give us the magnitude and find the direction through the RHR-1.

## How do you calculate the magnetic force of a permanent magnet?

And here the second key feature enters; the magnetic field of permanent magnets can be calculated from the equivalent surface current density I = dI/ds = Br/µ0 that is proportional to the remanent magnetic field Br of the permanent magnet material.

## What does it mean to attract two magnets?

When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges. Like charges repel, and unlike charges attract. Since a free hanging magnet will always face north, magnets have long been used for finding direction.

## Which magnet is strongest?

The strongest permanent magnets are neodymium (Nd) magnets. They are made from an alloy of neodymium, boron and iron to form Nd2Fe14B structure. Neodymium is a rare earth element.

## What is the best magnet?

1 – Neodymium iron boron (NdFeb) Neodymium magnets are the most powerful magnets available (per unit volume) with the ability to attract 1,000 times their own weight.

## Who invented magnet?

The ancient Greeks were the first known to have used this mineral, which they called a magnet because of its ability to attract other pieces of the same material and iron. The Englishman William Gilbert (1540-1603) was the first to investigate the phenomenon of magnetism systematically using scientific methods.

## Which magnets are used in day to day life?

The two types of uses of magnets in daily life are: Electromagnets. Permanent magnets.

## Where is magnet used in daily life?

Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people’s bodies.

## What are 4 properties of magnets?

Properties of Magnet Poles of a Magnet: Magnets have two poles, where the strength of the magnetic field is the strongest. Magnetic poles exist in pairs. No matter how small a magnet is, it is impossible to separate one pole. Like poles always repel each other but opposite poles attract.

## What is a magnet Grade 7?

Magnetism is the force that pulls (attracts) or pushes (repels) an object which contains metal towards, or away from, a magnet. A magnet has an area around it over which it can exert a force on objects. The further away the object is from the magnet, the weaker the force. This area is called the magnetic field.

## What is magnetic force and example?

magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron.

## How do magnets move objects?

The like poles are attracted to unlike poles, but like poles repel each other. For example, the north pole of one magnet is attracted to the south pole of another. Magnets have a force or magnetic field that attracts metal objects such as iron and steel. This makes magnets useful in car ignitions and toys.

## How can you demonstrate the magnetic force write with an example?

Answer: we can show a magnetic force using a magnet…. like if we will put two magnets together with the same side facing then they will repeal and if we will the opposite sides/poles then they will attract….. that’s how we will show a magnetic force on a magnet…

## What are some examples of magnetic energy?

Some examples of magnetic energy are electric motors, generators, loudspeakers, etc.