An electromagnet can be turned on and off by controlling the electric current running through it, allowing for greater efficiency in controlling magnetic fields. Additionally, the strength of an electromagnet can be easily adjusted by changing the amount of current flowing through it, which is not possible with a permanent magnet. Lastly, electromagnets can be designed to have magnetic fields that can cover larger areas compared to permanent magnets.
No, an electromagnet is not a permanent magnet. It is a magnet that produces a magnetic field when an electric current is passed through it, and the magnetic field disappears when the current is turned off.
An electromagnet is a temporary magnet that only produces a magnetic field when an electric current is flowing through it, while a permanent magnet retains its magnetism without needing an external electric current. Additionally, the strength of an electromagnet can be easily adjusted by changing the amount of current flowing through it, while the strength of a permanent magnet is fixed.
The magnet in a compass is a permanent magnet. It retains its magnetism without the need for an external electrical current.
To make an electromagnet rotate, you can place it in the proximity of a permanent magnet. When a current flows through the electromagnet, it interacts with the magnetic field of the permanent magnet, causing the electromagnet to rotate. This setup can be used in devices like electric motors and generators.
An electromagnet is typically stronger than a permanent magnet because it can be adjusted by changing the electric current flowing through it. Permanent magnets have a fixed magnetic strength that cannot be easily altered.
electromagnet
Perminant magnet
PermanentThere is no source of current in a compass, therefore the magnet is a permanent magnet.
No, an electromagnet is not a permanent magnet. It is a magnet that produces a magnetic field when an electric current is passed through it, and the magnetic field disappears when the current is turned off.
An electromagnet is a stronger magnet.
An electromagnet is a temporary magnet that only produces a magnetic field when an electric current is flowing through it, while a permanent magnet retains its magnetism without needing an external electric current. Additionally, the strength of an electromagnet can be easily adjusted by changing the amount of current flowing through it, while the strength of a permanent magnet is fixed.
A permanent magnet (i.e. not an electromagnet) will be demagnetised by heating it.
The magnet in a compass is a permanent magnet. It retains its magnetism without the need for an external electrical current.
To make an electromagnet rotate, you can place it in the proximity of a permanent magnet. When a current flows through the electromagnet, it interacts with the magnetic field of the permanent magnet, causing the electromagnet to rotate. This setup can be used in devices like electric motors and generators.
An electromagnet is a magnet while an electric current is running through the coil. Turn off the current and it is no longer magnetised, and is, therefore, not a permanent magnet.
An electromagnet is typically stronger than a permanent magnet because it can be adjusted by changing the electric current flowing through it. Permanent magnets have a fixed magnetic strength that cannot be easily altered.
An electromagnet is like a permanent magnet in that both can attract objects made of iron or steel. However, an electromagnet can be turned on and off by controlling the flow of electricity through it, while a permanent magnet always produces a magnetic field.