Temporary magnets are used in

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Answer : 

Temporary magnets are used in loud-speakers,generators, motors.
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Related questions

The materials having low retentivity are suitable for making (a) weak magnets (b) temporary magnets (c) permanent magnets (d) none of the above

Description : The materials having low retentivity are suitable for making (a) weak magnets (b) temporary magnets (c) permanent magnets (d) none of the above

Last Answer : (b) temporary magnets

Hard magnetic materials are used for making (A) Permanent magnets. (B) Temporary magnets. (C) Conductors. (D) Insulator.

Description : Hard magnetic materials are used for making (A) Permanent magnets. (B) Temporary magnets. (C) Conductors. (D) Insulator.

Last Answer : (A) Permanent magnets.

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.

Are magnets involved in mail delivery?

Description : Are magnets involved in mail delivery?

Last Answer : Only when dealing with love letters & valentine cards, magnets/attraction.

Where can I get really cool car magnets?

Description : Where can I get really cool car magnets?

Last Answer : I have seen these hanging out of the trunk before.

Aren't gravity and magnets related strongly to one another, and if yes, wouldn't that give us our TOE?

Description : Aren't gravity and magnets related strongly to one another, and if yes, wouldn't that give us our TOE?

Last Answer : all I understand this is a naive argument, but it would be a pleasure knowing your take on it :)

Do magnets rust or react with water in any other unpleasant way?

Description : Do magnets rust or react with water in any other unpleasant way?

Last Answer : no, don’t think so.

Does anyone know a good place to find refrigerator magnets?

Description : Does anyone know a good place to find refrigerator magnets?

Last Answer : I usually find them under the refrigerator.

Where can I find STRONG magnets?

Description : Where can I find STRONG magnets?

Last Answer : answer:I would Google "neodymium rare earth magnets" I have never bought them online so I can't provide a link (that I trust) to a specific place to buy them.

Who shows how to make electricity from magnets ?

Description : Who shows how to make electricity from magnets ?

Last Answer : Faraday and Henry show this process.

How many and what are the religions of magnets ?

Description : How many and what are the religions of magnets ?

Last Answer : There are two religions of magnetism, namely, north and south.

What attracts magnets ?

Description : What attracts magnets ?

Last Answer : Reverse national magnet attracts poles.

How many types of artificial magnets ?

Description : How many types of artificial magnets ?

Last Answer : Artificial magnets are magnets that are made in the laboratory using different magnets that are suitable for human work. There are two types of artificial magnets. Namely- 1. Permanent magnet and II. Temporary magnet.

How many types of magnets and what are they ?

Description : How many types of magnets and what are they ?

Last Answer : There are two types of magnets: 1. Natural magnets: Magnets found in nature or in mines are called natural magnets. In the past, natural magnets were called loadstones. 2. Artificial ... made in the laboratory using different magnetic materials suitable for human work are called artificial magnets.

Why do two aton magnets work the other way around?

Description : [img] https:///wp-content/uploads/2017/02/Fénykép-0073_1.jpg [/ img] is this the reverse operation?

Last Answer : It's really weird, because the magnetism is basically constant. Each magnet has 2 poles. I think it can only be that they are in different positions relative to each other in the holder.   

How the hell do magnets work?

Description : Can anyone tell me how magnets work?

Last Answer : There is a lot on wikipedia, just enter a magnet, magnetic dipole or something similar.

Can perpetuum be mobile from magnets?

Description : I wondered how he did something to keep spinning. But I would use magnets for that. It probably can't be? To build a perpetuum mobile.

Last Answer : So draw what you mean. What will move those magnets? The North Pole with the South will attract and what next?

What is a machine that produces electrical energy by turning coils of wire around powerful magnets?

Description : What is a machine that produces electrical energy by turning coils of wire around powerful magnets?

Last Answer : Need answer

What are statement that are true of magnets?

Description : What are statement that are true of magnets?

Last Answer : A magnet always has two poles.They have a magnetic field.Electromagnets can be made much stronger than permanent magnets.A magnet always has two poles.

Do different liquids affect the strength of magnets?

Description : Do different liquids affect the strength of magnets?

Last Answer : yes i tried and different liquids affect the strength ofmagnets

What type of magnets are produce by running electric current through a soft iron core?

Description : What type of magnets are produce by running electric current through a soft iron core?

Last Answer : electromagnet

What permanent magnets can affect?

Description : What permanent magnets can affect?

Last Answer : Both permanent magnets and electromagnets. -Apex

Are the magnetic lines force of a bar magnets strongest at the end of the magnet or in the middle?

Description : Are the magnetic lines force of a bar magnets strongest at the end of the magnet or in the middle?

Last Answer : Feel Free to Answer

What are three types of magnets?

Description : What are three types of magnets?

Last Answer : They are permanent, temporary and electromagnets

How could you find out the shape of the magnetic field when two bar magnets are close to each other?

Description : How could you find out the shape of the magnetic field when two bar magnets are close to each other?

Last Answer : You can cover the magnets with paper and scatter iron filings onthe paper. Tap it gently and the filings should take up the patternof the magnetic field. Alternatively, a tiny compass called aplotting ... This ismore tedious but less messy, and can also show you the direction ofthe lines of force.

How are the magnets kept safely?

Description : How are the magnets kept safely?

Last Answer : The main safety precaution is not to let magnets near certainitems that might be damaged by magnets - for example, credit cardsor debit cards (which have a magnetic strip with information).

What happens when the poles of the two magnets come close together?

Description : What happens when the poles of the two magnets come close together?

Last Answer : What is the answer ?

What is the relationship between the strength of magnetic fields and the distance between 2 magnets?

Description : What is the relationship between the strength of magnetic fields and the distance between 2 magnets?

Last Answer : Need answer

How could you find out the shape of the magnetic field when two bar magnets are close to each other?

Description : How could you find out the shape of the magnetic field when two bar magnets are close to each other?

Last Answer : You can cover the magnets with paper and scatter iron filings onthe paper. Tap it gently and the filings should take up the patternof the magnetic field. Alternatively, a tiny compass called aplotting ... This ismore tedious but less messy, and can also show you the direction ofthe lines of force.

What are three types of magnets?

Description : What are three types of magnets?

Last Answer : They are permanent, temporary and electromagnets

Do the doors fix in place with magnets or do they use some type of latch or indention to hold the doors shut?

Description : Do the doors fix in place with magnets or do they use some type of latch or indention to hold the doors shut?

Last Answer : The doors use magnets to hold them shut. The doors have knobs for opening.

Do car magnets damage paint after prolonged use?

Description : Do car magnets damage paint after prolonged use?

Last Answer : Car magnets are completely safe to use on a car. The metal of the magnet does not interact with the paint of the car. Car magnets are specifically designed to be placed on a car with no damage.

A particular device uses electromagnetism by using electricity to move magnets. The magnets in this device are than used to work. Which device uses electromagnetism In this way?

Description : A particular device uses electromagnetism by using electricity to move magnets. The magnets in this device are than used to work. Which device uses electromagnetism In this way?

Last Answer : An electric motor

When opposite poles of two magnets are brought together, the poles?

Description : When opposite poles of two magnets are brought together, the poles?

Last Answer : 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.

What is one way to store a lot of potential energy in the magnetic field of the two interacting magnets?

Description : What is one way to store a lot of potential energy in the magnetic field of the two interacting magnets?

Last Answer : You can store energy in a rubber band by stretching it, and this potential energy becomes kinetic energy when you let go

Permanent magnets can be made from A. Aluminum B. Lead C. Zinc D. Cobalt

Description : Permanent magnets can be made from A. Aluminum B. Lead C. Zinc D. Cobalt

Last Answer : ANSWER: D

Magnets attract magnetic substances are iron, nickel, cobalt, etc. They can also repel - (1) paramagnetic substances (2) ferromagnetic substances (3) diamagnetic substances (4) non-magnetic substances

Description : Magnets attract magnetic substances are iron, nickel, cobalt, etc. They can also repel - (1) paramagnetic substances (2) ferromagnetic substances (3) diamagnetic substances (4) non-magnetic substances

Last Answer : (3) diamagnetic substances Explanation: Those materials which when placed in a magnetic field become weakly magnetized in a direction opposite to that of the applied field, are called as diamagnetic materials ... : bismuth, antimony, copper, gold, quartz, mercury, water, alcohol, air, hydrogen etc.

Magnetic keepers are used to protect magnets from : (1) Earth's magnetic field (2) effect of other magnets (3) self-demagnetization (4) demagnetization due to heating

Description : Magnetic keepers are used to protect magnets from : (1) Earth's magnetic field (2) effect of other magnets (3) self-demagnetization (4) demagnetization due to heating

Last Answer : (3) self-demagnetization Explanation: Magnets have a tendency to lose their magnetism when their poles are left bare. This is called selfdemagnetization. Magnets are, therefore, protected by keeping them in magnetic keepers.

As shown in the illustration, all 'MS' contacts are opened and closed by means of ________. EL-0073 A. operating coils B. magnets C. manual operation of the master switches D. solenoid switches

Description : As shown in the illustration, all 'MS' contacts are opened and closed by means of ________. EL-0073 A. operating coils B. magnets C. manual operation of the master switches D. solenoid switches

Last Answer : Answer: C

The frequency of an alternator at a given RPM is determined by the _____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Description : The frequency of an alternator at a given RPM is determined by the _____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Last Answer : Answer: B

A synchronous motor maintains synchronism with the rotating field because _____________. A. field strength varies directly with rotor slip B. DC current applied to the rotor coils causes the rotor magnets to lock in with the rotating flux of the stator C. the stator poles are dragged around due to the flux created by the excitation current D. the stator flux rotates in the opposite direction

Description : A synchronous motor maintains synchronism with the rotating field because _____________. A. field strength varies directly with rotor slip B. DC current applied to the rotor coils causes the rotor ... the flux created by the excitation current D. the stator flux rotates in the opposite direction

Last Answer : Answer: B

Which of the following statements is true concerning all three-phase alternators? A. Each has three separate but identical armature windings acted on by one system of rotating magnets. B. Each has one armature winding acted on by three identical but separate systems of rotating magnets. C. All three-phase alternators are designed to operate with a 0.8 leading power factor. D. The three phases always provide power to the load through three sets of slip rings and brushes.

Description : Which of the following statements is true concerning all three-phase alternators? A. Each has three separate but identical armature windings acted on by one system of rotating magnets. B. Each has one ... The three phases always provide power to the load through three sets of slip rings and brushes.

Last Answer : Answer: A

The frequency output of an operating alternator is controlled by the _____________. A. relative speed of the rotor poles B. number of turns of wire in the armature coil C. strength of the magnets used D. output voltage

Description : The frequency output of an operating alternator is controlled by the _____________. A. relative speed of the rotor poles B. number of turns of wire in the armature coil C. strength of the magnets used D. output voltage

Last Answer : Answer: A

One factor that determines the frequency of an alternator is the ____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Description : One factor that determines the frequency of an alternator is the ____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Last Answer : Answer: B

Which alloys is used for making magnets?

Description : Which alloys is used for making magnets?

Last Answer : Alnico

Which alloy is used for making magnets for hearing aids?

Description : Which alloy is used for making magnets for hearing aids?

Last Answer : Alinco

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

Alinco, which is a aluminium-cobalt-nickel steel, is used for making (A) Surgical instruments (B) Powerful magnets (C) Chemical equipments (D) Boiler tubes

Description : Alinco, which is a aluminium-cobalt-nickel steel, is used for making (A) Surgical instruments (B) Powerful magnets (C) Chemical equipments (D) Boiler tubes

Last Answer : (B) Powerful magnets

Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials (C) Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Description : Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft ... hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Last Answer : Option D