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Yes true. Even without the iron core as current passes through the coil then the coil would act as a magnetic shell. If the wire is wound in a helical form, then the device is known as solenoid. So with the current in the solenoid it would act as if a bar magnet. If iron core is introduced then the magnetic lines would be concentrated and hence an intense magnet could be produced. The pole of this system will be determined by using 'end rule'.

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14y ago
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14y ago

A coil of wire wrapped around a ferromagnetic (iron) core and connected to a DC source is an electromagnet.

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9y ago

This is called an electromagnet.
Electromagnet

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12y ago

When a current carrying coil of water is running, creating an electric field, it is called a solenoid.

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14y ago

That is called an electromagnet.

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13y ago

Is called an electro magnet.

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Q: A coil that is magnetized only when an electric current flows through it?
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