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Does adding electric currents to something that is already magnetized increase or decrease the power of the magnet?
Wiki User
∙ 12y ago
By 'adding electric currents', you are presumably talking about passing a d.c. current through a coil wound around a magnet?
First of all, you cannot increase the flux density of a magnet beyond saturation, regardless of the current or number of turns that make up the coil. Whether on not you increase or reduce the flux density depends on the polarity of the coil compared with the polarity of the magnet; if they are opposite then, yes, you can demagnetise the magnet and, in fact, remagnetise it in the opposite direction.
Wiki User
∙ 12y ago
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What happens to the currents in a circuit?
a cell pushes electric currents around a circuit.If there are two or more cells then more currents will flow through them.
Do all currents provide the same amount of energy?
Of course not! There is no direct relationship between electric current and electric energy. They aren't even measured in the same units. Also in most cases small electric currents provide less electric energy that very large electric currents. If all electric currents provided the same electric energy then the electric current from a flashlight battery that lights the bulb when you turn the switch on could provide the same electric energy as the electric current in a lightning bolt when it strikes... therefore every time you turned on a flashlight the electric energy would destroy the flashlight and electrocute you! As this doesn't happen, the only answer that your question can have is no!
The electric force that makes current flow in a circuit is related to the what?
The electric force that makes current flow in a circuit is related to the resistance.
Why is 3 phase power advantageous in higher voltage applications?
The 3 phase electric power is very common way of electric power transmission. Three circuit conductors carry three alternating currents the first conductor as reference the other currents are delayed in time for 1/3 and 2/3 of the cycle of the electrical currents.
How tall are the power lines in Ontario?
An ammeter is a measuring instrument used to measure the electric current in a circuit. Electric currents are measured in amperes (A), hence the name
What is A tempoary magnet made when electric currents flows through a wire wrapped around an iron case?
This is called an elecro-magnet, and it is only magnetized while current is running through it.
Which current is best?
That depends on whether you are talking about electric currents, water currents, or something entirely different. Better ask another question, where you clarify this.
When are electromagnets used to increase or decrease the voltage of electric currents?
Electromagnets are never used to increase or decrease the voltage in a circuit. These magnets in conjunction with a rotating device (an armature) can create a voltage but the do not have any effect on a voltage.
How are electric charges and electric currents related?
Your mother HAHAHAHAHAhAHAH
Do oceanic electric fields produce electric currents?
Yes
What is the cause of an electric current?
Electric currents are caused by voltages.
What effect does electricity have?
Electric currents
Electromagnets are the result of?
Electric currents.
A place of nonmagnetic metal that becomes magnetized when an electric current flows around it is called?
electromagnet
When there is a break in an electric tools insulation or wiring the tool metal parts may become?
magnetized
A piece of nonmagnetic metal that becomes magnetized when an electric current flows around it is called an?
electromagnet
What measures electric currents?
An ampere meter
