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Magnetic materials (usually iron) is used in the core of electromagnets. A coil is wrapped around this core, an electric current applied and it remains magnetized as long as the current is on. Once the current is turned off, it loses most of it's magnetism.
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Which separation technique do you use to separate a magnetic substance from a nonmagnetic substance?
Of course, using a magnet (electromagnet). This is valid for many mixtures.
How does a magnetic substance turn into a electromagnet?
Magnetic materials (usually iron) is used in the core of electromagnets. A coil is wrapped around this core, an electric current applied and it remains magnetized as long as the current is on. Once the current is turned off, it loses most of it's magnetism.
Why is an electromagnet not a permanet magnet?
because the copper wire in it is only magnetic when there is electricity running through it so when you turn of the electricity soure it is no longer magnetic
How is a permanentmagnet different from a electromagnet?
a permanent magnet is always magnetic as an electromagnet is only magnetic when it is wound around with wire and energised
What does a electromagnet create?
a magnetic field
How does coiling a wire affect the magnetic field generated an electromagnet?
Coiling a wire increases the magnetic field of an electromagnet because the magnetic field around a wire is circular and perpendicular to the wire. Each turn of the wire reinforces the field of the one next to it. The magnet field is strengthened. (I was in A+, too ;) ) - Dawn Ayers
Is an electromagnet always magnetic?
No. Only when an electric charge is put through the electromagnet.
What is difference between of Electromagnet and Electric Magnetic Field?
An electromagnet is a magnet that only generates magnetic forces when electricity is running through it, basically a magnet that can be turned on and off. An electromagnetic field is the magnetic force generated when an electromagnet is used.
Can an electromagnet create a magnetic field when the battery is removed?
If the electromagnet has a core, which has become magnetized, then the core will have a residual magnetic field when the power is removed.
What happens when you decrease the current in an electromagnet?
When you decrease the current in an electromagnet, the magnetic field decreases.
Strong temporary magnet formed when a current is passed through a coil of wire?
A magnetic field.
Is Venus electromagnet?
No. Venus has no magnetic field.
