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'Magnetic Force' (symbol: H), an obsolete term, which has been long replaced by the term, 'Magnetic Field Strength', is defined as the magnetomotive force per unit length of a magnetic circuit. It is measured in amperes per metre(A/m), although this is often spoken as 'ampere turns' per metre. And, no, it is not the same thing as 'magnetic force'.
(If you compare a magnetic circuit with an electric circuit, then 'magnetomotive force' is equivalent to 'electromotive force' -and, continuing the analogy, magnetic field strength is equivalent to 'voltage gradient'.)
Magnetomotive force is the product of the current flowing through a coil and its number of turns. It's unit is the ampere (A), but is often spoken as 'ampere turn'.
So, by way of example, suppose we have a magnetic circuit comprising a steel toroid of circumference 100 mm (0.1 m), around which a coil of 200 turns is uniformly wound. If a current of 0.5 A passes through the coil, then the magnetic field strengthwill be:
H = (I N) / circumference = (0.5 x 200) / 0.1 = 1000 A/m
What else can I help you with?
What is the difference between a strong and a weak magnetic field?
A strong magnetic field has a higher magnetic flux density than a weak magnetic field. This means that a strong magnetic field exerts a greater force on nearby magnetic materials compared to a weak magnetic field. Additionally, strong magnetic fields are more effective for magnetizing materials or creating magnetic induction.
What is a temporary magnet?
A temporary magnet is a material that becomes magnetized when placed in a magnetic field but loses its magnetism once the external field is removed. Common examples include iron and steel. Temporary magnets are often used in applications like electromagnets and magnetic strips on credit cards.
What force creates a magnetic force?
Typically, an electric current creates a magnetic force. Also, magnetic domains aligned correctly and properly can cause a magnetic force.
What type of force is magnetic force?
Magnetic force is a non-contact force. It can also be described as a force of 'Attraction' or 'Repulsion'.
Is magnetic force a matter?
Yes it is
What magnets do not retain their magnetism after a magnetizing force has been removed?
Temporary magnets, such as soft iron, do not retain their magnetism after the magnetizing force has been removed. They only exhibit magnetic properties when under the influence of an external magnetic field.
What is a bh curve?
A graph showing the relation between the magnetic flux density B and the magnetizing force H , for a magnetic material.
What is residualmagnetism?
The retained magnetic flux of the material, even after the removal of the external magnetizing force is known as residual magnetism.
What do you mean by residual magnetism in DC shunt generators?
The magnetic field that remains in a magnetic material ( a winding core) after the removal of electric power or the magnetizing force.
Does the magnetic memory of rock on the ocean floor change over time?
Yes. The ability of a material to retain magnetism after the magnetizing force is removed is magnetic memory.
What is the scientific term for magnetizing something?
The scientific term for magnetizing something is "ferromagnetism." This occurs when the magnetic dipoles within a material align in the same direction, creating a net magnetic field.
What instrument is used to measure the magnetic field strength at the center of a magnetizing coil?
A teslameter is the instrument commonly used to measure the magnetic field strength at the center of a magnetizing coil. It is designed to detect and measure the magnetic field in tesla units.
What is the difference between a strong and a weak magnetic field?
A strong magnetic field has a higher magnetic flux density than a weak magnetic field. This means that a strong magnetic field exerts a greater force on nearby magnetic materials compared to a weak magnetic field. Additionally, strong magnetic fields are more effective for magnetizing materials or creating magnetic induction.
Is magnetizing a paper clip considered physical or chemical change?
Magnetizing a paper clip is considered a physical change. This is because the process of magnetization does not alter the chemical composition of the paper clip. The magnetic properties are induced by aligning the magnetic domains within the material, which is a reversible process. Chemical changes, on the other hand, involve the formation of new substances with different chemical properties.
Is magnetizing steel a chemical or a physical?
physical, just the aligning of magnetic domains what were previously random in orientation.
The flux density that remains when the magnetizing force is removed is called?
residual magnetism
Is magnetizing steel a chemical change or physical change?
physical, just the aligning of magnetic domains what were previously random in orientation.
