Member • May 9, 2011
Member • May 9, 2011
Member • May 9, 2011
Member • May 9, 2011
Member • May 9, 2011
Member • May 9, 2011
Permanent Magnet is used in these cases for getting repulsion!everett.pattisonThe electric bell or dynamo function off electromagnets which in its most basic form, is a coil of wire wrapped around an iron core which produces the magnetic field, permanent magnets are not used let alone have voltage put through them.
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Member • May 9, 2011
Member • May 9, 2011
Member • May 10, 2011
Member • May 10, 2011
Member • May 10, 2011
You are right.praveenscienceSo you mean to say, applying voltage to the magnet and not to a coil and wrapping it on a magnet! Right? If this is the case, then the magnet itself is a conductor performing a short circuit... 😀
Member • May 10, 2011
Yes, that is what '#-Link-Snipped-#' was trying to ask, not talking about electric bells and dynamos.praveenscienceSo you mean to say, applying voltage to the magnet and not to a coil and wrapping it on a magnet! Right? If this is the case, then the magnet itself is a conductor performing a short circuit... 😀
Member • May 10, 2011
Magnet can only be Iron (Fe) right??? And even a kid knows that Iron is a good conductor of electricity. Then, it is evident that it makes a short circuit. What is ceramic magnet then?bioramaniYou are right.
If it is a metallic magnet (AlNiCO for example), it is like any other conductor and will carry a current. This will create a magnetic field around the magnet whose sign will depend on the direction of current according to Fleming's Rule. This may enhance or detract from the permanent magnet's own field if a DC. If AC the effect will be cyclic at the frequency of the supply. If it is a ceramic magnet it will not conduct.
Biormanai
Member • May 10, 2011
As Shakespeare (according to some die hard Tamils, he was a Tamil called ஜெகசிறà¯à®ªà®¿à®¯à®©à¯, who migrated to London!) said, 'what's in a name?'praveenscienceMagnet can only be Iron (Fe) right??? And even a kid knows that Iron is a good conductor of electricity. Then, it is evident that it makes a short circuit. What is ceramic magnet then? By the way, your signature is wrong! 😔
Member • May 10, 2011
Thank you sir... Learnt something new... I too had a magnet which was very flexible, and am damn sure it is not Iron! 😛 Would it be ceramic then???bioramaniAs Shakespeare (according to some die hard Tamils, he was a Tamil called ஜெகசிறà¯à®ªà®¿à®¯à®©à¯, who migrated to London!) said, 'what's in a name?'
Magnets can be made out of any ferromagnetic material.
#-Link-Snipped-#
Ceramic ones are electrical insulators.
Bioramani
(made sure of that!)
Member • May 10, 2011
It must be one of the magnets made of ceramic powder in a flexible polymer matrix, commonly used as promotional material (Fridge stickers) or presentation graphics.praveenscienceThank you sir... Learnt something new... I too had a magnet which was very flexible, and am damn sure it is not Iron! 😛 Would it be ceramic then???
Member • May 13, 2011
Member • May 13, 2011
Hoi! Where are polarities coming in magnets???amar.amari think its polarities might change due to the electric current..
Member • May 13, 2011
Member • May 13, 2011
Man! These permanent poles never change for sure!!! 😲amar.amarit has the poles naa north and south!!
Member • May 20, 2011
Why metallic conduct and Ceramic magnets don't conduct. Where is the energy going in ceramic magnets?bioramaniYou are right.
If it is a metallic magnet (AlNiCO for example), it is like any other conductor and will carry a current. This will create a magnetic field around the magnet whose sign will depend on the direction of current according to Fleming's Rule. This may enhance or detract from the permanent magnet's own field if a DC. If AC the effect will be cyclic at the frequency of the supply. If it is a ceramic magnet it will not conduct.
Biormanai
Member • May 20, 2011
They are not metals... Only metals are capable of conducting electricity... 😀dileep kWhy metallic conduct and Ceramic magnets don't conduct. Where is the energy going in ceramic magnets?
Member • May 20, 2011
Member • May 20, 2011
Before that it should conduct the electrical energy right?venueeedue to the application of electrical energy on permenent magnet ,it will lossse or reduces the magnitic strenth.......
Member • May 20, 2011
Hey that is a question to Bioramani sir's Answer.Metallic magnets will conduct and I wanted to know why ceramic magnets don't conduct. If they conduct then where's the energy going.praveenscienceThey are not metals... Only metals are capable of conducting electricity... 😀
Member • May 21, 2011
Member • May 21, 2011
Member • May 21, 2011
Member • May 21, 2011
Member • May 21, 2011
Yes,,, So???narayana murthyhahahaha guys inside wire we are having a conductor observe it
as well gold, copper such metals are good conductors due to less availability we use some combination alloy materials for transmission so we use them for transmission
Member • May 21, 2011
wire conductspraveenscienceYes,,, So???
Member • May 21, 2011
Member • May 21, 2011
but thats not concentrated with you praveen hahahapraveenscienceThat's what even I said... 😛
Member • May 21, 2011
That's a new fact here... Thanx... And Dil is always thinking of dying, isn't it???narayana murthyceramic magnets means farrite right they are materials which gets energies when others gives power to energize
Member • May 21, 2011
hahaha may be but he always saying i don't want to die so pitypraveenscienceThat's a new fact here... Thanx... And Dil is always thinking of dying, isn't it???
Member • May 21, 2011
I seriously don't understand how much we are TJing... 😛 Yeah, that's the talent of Dil!narayana murthyhahaha may be but he always saying i don't want to die so pity
just kidding
Member • May 22, 2011
hehe You TJing me 😛 😁praveenscienceI seriously don't understand how much we are TJing... 😛 Yeah, that's the talent of Dil!
Member • May 22, 2011
Dileep we need free electrons (or 'holes' as in semiconductors) to conduct electricity. Ceramics do not have them. So they are insulators.dileep kI wanted to know why ceramic magnets don't conduct. If they conduct then where's the energy going. @ Praveen I think we can safely jump into the water with an electric wire in it now 😛
Member • May 26, 2011
It depends on the exact situation.dileep kCEans, I have a crazy doubt
What will happen if the supply is given directly to the permanent magnet?
Member • May 26, 2011
Your swimming pool example is so fatal as there must be any ground contact in the swimming pool as swimming pools are concrete erected on bare ground. But your answer is so informative.bioramaniDileep we need free electrons (or 'holes' as in semiconductors) to conduct electricity. Ceramics do not have them. So they are insulators.
You may be right about jumping into a pool with a live wire dipped in it. Provided the the person jumping in is not connected with a good ground wire, no current passes through the person. One can hang from a 11 KV live wire safely so long as he is isolated. Human body does have some conductivity. On a wet surface 220 V can be fatal. More than a few microns directly through the heart can kill.
Member • Jun 1, 2011
Member • Jun 1, 2011
Member • Jun 1, 2011
(I know you all are busy, but...) At least when people post something, the Mods can actually pm them and ask them to either edit the post or ask them if Mods can delete them if the posting member also feels that the post is not relevant to the topic.durga@ AJ
As moderators we can only delete spam. If users don't want to hold the discussion in a relevant method, mods are not responsible for editing the thread as well the users are all regular users . We do warn when it is needed or some one is spamming.
Though it is responsibly of Mods to keep the place clean, is is as well the responsibility of CEans not to soil it. As someone rightly said -" Even a diamond cannot be found in a ton of coal".
Member • Jun 1, 2011
Member • Jun 4, 2011
