# What is an example of a magnetic field?

A current I through a long, straight wire produces a magnetic field with strength H=I/2πr at a distance r from the wire. So the field strength is inversely proportional to the distance from the wire.

## How do you calculate magnetic field in physics?

It is represented as vector H and is defined as the ratio of the MMF needed to create a certain Flux Density (B) within a particular material per unit length of that material. Magnetic field intensity is measured in units of amperes/metre. It is given by the formula: H = B μ − M.

## 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 is the formula for magnetic field strength?

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 do you understand by magnetic field explain with equation?

Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.

## What are 3 examples of magnetic?

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 is magnetic field used in everyday life?

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.

## What is magnetic force and its example?

Summary. The strength of the magnetic field created by current in a long straight wire is given by B=μ0I2πR B = μ 0 I 2 π R (long straight wire) where I is the current, R is the shortest distance to the wire, and the constant μ0=4π×10−7T⋅m/s μ 0 = 4 π × 10 −7 T ⋅ m/s is the permeability of free space.

## What is the formula of magnet?

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

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

What is the unit of magnetic field? Magnetic field is denoted by B and H. The SI unit of H is amperes per metre and the SI unit of B is Newtons per metre per ampere or Teslas.

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

k is the magnetic constant and its value is given as: k = μ 0 4 π w h e r e μ 0 is p e r m e a b i l i t y o f f r e e s p a c e k = 4 π × 10 – 7 H / m 4 π k = 10 – 7 H / m.

## What are the 4 types of magnetic?

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

## 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 is unit of magnetic field?

μ=n(n+2) where n= Number of unpaired electrons.

## What is the value of K in magnetic field?

Definition of magnetic field : the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected.

## Where is magnetic field strongest?

It is strongest at the poles. So, what are magnetic poles? Magnetic poles are opposite ends of a magnet where the magnetic field is strongest.

## How do you calculate magnetic moment?

The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields. Magnetic fields can be illustrated by magnetic flux lines. At all times the direction of the magnetic field is shown by the direction of the magnetic flux lines.

## What is magnetic field in simple words?

Magnetic Raw Materials The five types are, alnico, ferrite, flexible rubber and the rare earth magnets samarium cobalt and neodymium. Read on to find out about each raw material, how the types of permanent magnets are made and each one’s magnetic properties.

## What is a magnetic field Simple?

Rubber, plastic, stainless steel, feather, paper, mica, gold, silver, leather, and other non-magnetic materials are examples.

## What are the 5 magnetic materials?

Magnetic substances are substances that get attracted to magnets. Few of the magnetic substances are – iron, steel, cobalt and nickel.

## What are the 10 examples of non magnetic materials?

Today, two hundred years later, we know that the human body is indeed magnetic in the sense that the body is a source of magnetic fields, but this body magnetism is very different from that imagined by Mesmer.

## What are magnetic materials give two examples?

Magnetic fields are used throughout modern technology, particularly in electrical engineering and electromechanics. Rotating magnetic fields are used in both electric motors and generators.

## Does human body has magnetic field?

Paper clips, scissors, screws, nuts, and bolts are just a few common everyday objects that are magnetic. A magnet will not attract paper, rubber, wood, or plastic.

## What is application of magnetic field?

If it’s real gold it will not stick to the magnet. (Fun fact: Real gold is not magnetic.) Fake gold, on the other hand, will stick to the magnet. If that necklace leaps to the magnet, your significant other has some explaining to do.