Magnetism of a magnet can be destroyed by

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Answer :

Magnetism of a magnet can be destroyed by heating, hammering, by inductive action of another magnet.

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Related questions

The commonly used material for shielding or screening magnetism is

Last Answer : The commonly used material for shielding or screening magnetism is soft iron.

The magnetism left in the iron after exciting field has been removed is known as

Last Answer : The magnetism left in the iron after exciting field has been removed is known as residual magnetism.

Materials subjected to rapid reversal of magnetism should have

Last Answer : Materials subjected to rapid reversal of magnetism should have high permeability and low hysteresis loss.

I just held a lighter to a magnet and it lost its magnetism. Why?

Description : I just held a lighter to a magnet and it lost its magnetism. Why?

Last Answer : This is too science-y for me but there’s a well-documented experiment here concluding the fact that heat reduces magnetic fields (or force, or whatever).

When a piece of iron is rubbed with a magnet it acquires magnetism ' What kind of change is this and why ?

Description : When a piece of iron is rubbed with a magnet it acquires magnetism ' What kind of change is this and why ?

Last Answer : When a piece of iron is rubbed by a magnet, it acquires magnetism ' is a physical or positional change. This is because when rubbed by a magnet, no other substance is formed from iron. Again , when a piece of magnetized iron is heated, it loses its magnetism and is converted into ordinary iron.

What is the magnetism of a magnet ?

Last Answer : Magnetism of a magnet A: Physical properties.

What is a magnet that does not keep its magnetism very long?

Description : What is a magnet that does not keep its magnetism very long?

Last Answer : This would be a temporary magnet.

What is a magnet that retains its magnetism?

Description : What is a magnet that retains its magnetism?

Last Answer : We generally refer to this as a permanent magnet.

Magnetism at the centre of a bar magnet is

Description : Magnetism at the centre of a bar magnet is

Last Answer : around- zero

Magnetism at the centre of a bar magnet is - (1) minimum (2) maximum (3) zero (4) minimum or maximum

Description : Magnetism at the centre of a bar magnet is - (1) minimum (2) maximum (3) zero (4) minimum or maximum

Last Answer : (3) zero Explanation: The field at the center is not zero, but weak. At the exact center of a magnet the field lines are parallel (straight lines if we draw it). Anywhere else they are slightly divergent.

Using Weber’s molecular theory of magnetism, describe the polarity of the magnetic poles produced by stroking a magnetic material from right to left with the south pole of a magnet.

Description : Using Weber’s molecular theory of magnetism, describe the polarity of the magnetic poles produced by stroking a magnetic material from right to left with the south pole of a magnet.

Last Answer : South pole at the right, north pole at the left.

Super conductivity can be destroyed by

Last Answer : Superconductivity can be destroyed by application of magnetic field.

The bar magnet has

Last Answer : The bar magnet has the dipole moment.

A rectangular magnet of magnetic moment M is cut into two piece ...

Description : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

Last Answer : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be M/2.

A permanent magnet

Last Answer : A permanent magnet attracts some substances and repels others.

The most effective and quickest may of making a magnet from soft iron is by

Last Answer : The most effective and quickest may of making a magnet from soft iron is by placing it inside a coil carrying current.

When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon

Last Answer : When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon resistance of the coil.

The working of a meter is based on the use of a permanent magnet...

Description : The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields

Last Answer : The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields a soft iron shielding is used.

Why don't magnets lose their magnetism?

Description : Why don't magnets lose their magnetism?

Last Answer : They can if you strike them. Unless it is a permanent magnet.

Where was the first magnetism discovered ?

Description : Where was the first magnetism discovered ?

Last Answer : Magnetism was first discovered in China.

What is magnetism ?

Description : What is magnetism ?

Last Answer : The attractive and directional religion of a magnet is called its magnetism. In other words, the force of a magnet is called magnetism. Without magnetism, matter cannot be considered as magnet.

What is magnetism ?

Description : What is magnetism ?

Last Answer : : In physics, magnetism refers to the phenomenon of attraction or repulsion of one substance by another. In general, the religion of magnetism is called magnetism. Note that magnetism is the physical property of a magnet , not a chemical property.

What are the main religions of magnetism ?

Description : What are the main religions of magnetism ?

Last Answer : There are four main religions of magnetism.

How much magnetism does a salt have?

Description : How much magnetism does a salt have?

Last Answer : Need answer

What has a form of energy that can produce heat light magnetism and electrical charges?

Description : What has a form of energy that can produce heat light magnetism and electrical charges?

Last Answer : if you mean to have commas between heat, light, magnetism, andelectrical charges then there is none. if heat light magnetism isall one thing then you're on your own.

How is the orientation of earths magnetism recorded in rocks of the ocean floor?

Description : How is the orientation of earths magnetism recorded in rocks of the ocean floor?

Last Answer : Earths magnetic orientation is locked into the rock when therock cools

Can you use magnetism to test a mineral?

Description : Can you use magnetism to test a mineral?

Last Answer : As magma rises as lava and cools to form rocks, any magneticminerals in the rock (eg magnetite and haematite) align themselveswith the earth's magnetic field. When the rock is solidified thismagnetism is ... north was. The position of magneticnorth is plotted on a map to show apparent polar wander.

How are magnetism and electricity the same?

Description : How are magnetism and electricity the same?

Last Answer : electromagnetic force

What is keeper and its use in magnetism?

Description : What is keeper and its use in magnetism?

Last Answer : A keeper is a iron or a steel bar that is used to retain thestrength of magnet.

Voltage build up in an isolated induction generator depends on A. Capacitor bank value B. Residual magnetism of the rotor iron C. Residual magnetism of the stator iron a) A, B b) A, B, C c) B d) A, C

Description : Voltage build up in an isolated induction generator depends on A. Capacitor bank value B. Residual magnetism of the rotor iron C. Residual magnetism of the stator iron a) A, B b) A, B, C c) B d) A, C

Last Answer : Ans: A

Photon is the fundamental unit/ quantum of – (1) gravitation (2) electricity (3) magnetism (4) light

Description : Photon is the fundamental unit/ quantum of – (1) gravitation (2) electricity (3) magnetism (4) light

Last Answer : (4) light Explanation: A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation. The modern photon concept was developed gradually by Albert Einstein.

Magnetism in materials is due to - (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest

Description : Magnetism in materials is due to - (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest

Last Answer : (2) circular motion of electrons Explanation: Myopia is commonly known shortsighted. It is a condition of the eye where the light that comes in does not directly focus on the retina but in ... most commonly correct myopia through the use of corrective lenses, such as glasses or contact lenses.

If overloading a DC machine becomes necessary in an emergency, you should ____________. A. cool the machine with portable blowers and fans B. hold thermal overload relays open with blocks of wood C. inject small amounts of CO2 into the windings for cooling D. increase the residual magnetism value of windings to reduce eddy currents

Description : If overloading a DC machine becomes necessary in an emergency, you should ____________. A. cool the machine with portable blowers and fans B. hold thermal overload relays open with blocks of ... the windings for cooling D. increase the residual magnetism value of windings to reduce eddy currents

Last Answer : Answer: A

The insulation of electric generators during short idle periods should be _____________. A. allowed to cool slowly to ambient temperatures B. flashed with direct current to remove any residual magnetism C. kept warm by using strip or space heaters D. relieved of all capacitive charge by grounding the conductors

Description : The insulation of electric generators during short idle periods should be _____________. A. allowed to cool slowly to ambient temperatures B. flashed with direct current to remove any residual ... using strip or space heaters D. relieved of all capacitive charge by grounding the conductors

Last Answer : Answer: C

Which of the methods listed is used to start a AC generator turning? A. Residual magnetism remaining in the field poles. B. Residual magnetism remaining in the field coils. C. Residual magnetism remaining in the armature. D. Rotation by a mechanical prime mover.

Description : Which of the methods listed is used to start a AC generator turning? A. Residual magnetism remaining in the field poles. B. Residual magnetism remaining in the field coils. C. Residual magnetism remaining in the armature. D. Rotation by a mechanical prime mover.

Last Answer : Answer: D

The twisting force developed by a motor and applied to a shaft is called _____________. A. magnetism B. electromotive force C. torque D. voltage

Description : The twisting force developed by a motor and applied to a shaft is called _____________. A. magnetism B. electromotive force C. torque D. voltage

Last Answer : Answer: C

In replacing a defective transformer with a new one, which of the following actions must be carried out to insure proper operation of the equipment it serves? A. The secondary leads must be grounded for 10 minutes to remove static charges. B. The transformer connections must be made as before with regard to the indicated polarity. C. The iron core of the transformer must be flashed to pre-magnetize it. D. The iron core must be grounded for 10 minutes to remove any residual magnetism.

Description : In replacing a defective transformer with a new one, which of the following actions must be carried out to insure proper operation of the equipment it serves? A. The secondary leads must be grounded ... magnetize it. D. The iron core must be grounded for 10 minutes to remove any residual magnetism.

Last Answer : Answer: B

One of the generator bearing shells is generally insulated from the end housing in order to prevent _____________. A. rapid brush wear B. residual magnetism leak off C. excessive field winding heat D. circulation of shaft currents

Description : One of the generator bearing shells is generally insulated from the end housing in order to prevent _____________. A. rapid brush wear B. residual magnetism leak off C. excessive field winding heat D. circulation of shaft currents

Last Answer : Answer: D

Loss of or weak residual magnetism in an alternator or generator can be corrected for by _________________. A. running the rotor in the opposite direction for 5 minutes B. allowing the generator to run at 10% of normal speed for 5 minutes C. running the generator at normal speed with the field rheostat fully counterclockwise D. using a storage battery or battery charger to 'flash' the field

Description : Loss of or weak residual magnetism in an alternator or generator can be corrected for by _________________. A. running the rotor in the opposite direction for 5 minutes B. allowing the generator ... rheostat fully counterclockwise D. using a storage battery or battery charger to 'flash' the field

Last Answer : Answer: D

If a magnetic controller contact fails to pick up when the operating coil is energized, one possible cause may be _______________. A. low spring pressure B. low voltage to the coil C. the residual magnetism of the contact faces D. dirty contact faces

Description : If a magnetic controller contact fails to pick up when the operating coil is energized, one possible cause may be _______________. A. low spring pressure B. low voltage to the coil C. the residual magnetism of the contact faces D. dirty contact faces

Last Answer : Answer: B

Insufficient brush pressure on a DC motor may cause _______. A. generator overload B. excess residual magnetism C. water vapor absorption D. sparking of the brushes

Description : Insufficient brush pressure on a DC motor may cause _______. A. generator overload B. excess residual magnetism C. water vapor absorption D. sparking of the brushes

Last Answer : Answer: D

The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the _____________. A. loss of residual magnetism B. absorption of moisture in the insulation C. insulation varnish flaking D. dirt collecting on the windings

Description : The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the _____________. A. loss of residual magnetism B. absorption of moisture in the insulation C. insulation varnish flaking D. dirt collecting on the windings

Last Answer : Answer: B

Who discovered the link between electricity and magnetism?

Description : Who discovered the link between electricity and magnetism?

Last Answer : Michel Faraday

Residual magnetism in steel for magnets is increased by the addition of (A) Nickel (B) Cobalt (C) Tungsten (D) Chromium

Description : Residual magnetism in steel for magnets is increased by the addition of (A) Nickel (B) Cobalt (C) Tungsten (D) Chromium

Last Answer : (B) Cobalt

Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. (A) Chromium (B) Nickel (C) Tungsten (D) Cobalt

Description : Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. (A) Chromium (B) Nickel (C) Tungsten (D) Cobalt

Last Answer : (D) Cobalt

Who discovered electro magnetism?

Description : Who discovered electro magnetism?

Last Answer : ‘Orsted’ a denish scientist discovered that whenever an electric current passes through a conductor, a magnetic field will be produced around that conductor in concentric circle. In addition to that heat will be produced in that conductor.  

What are the advantages of electro magnetism?

Description : What are the advantages of electro magnetism? 

Last Answer : a. Electro magnets can be magnetised very easily by sending DC through it. b. Changing the direction of the current through the coil can change the polarity of the poles. c. The strength of ... depending upon the need. e. The magnetic strength remains constant as long as the current is constant.

State the laws of magnetism.

Description : State the laws of magnetism. 

Last Answer : a. Magnet imparts its magnetic properties to other metals. b. When a magnet is suspended freely horizontally, it stands at geographical north and south. c. Every magnet has a north and its associated ... to the square of the distance between them. This is some times known as inverse square law.

Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation

Description : Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation

Last Answer : d) Polarisation

What is magnetism?

Description : What is magnetism?

Last Answer : Magnetism is a force which appears between magnets and magnetic materials like steel and iron. For example, a magnet will attract steel pins and iron nails brought near it.