EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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tightly wound coils
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more coils
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use a material more magnetic for the core
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use copper wires
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get rid of the core
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Detailed explanation-1: -Increase the number of coil turns. Increase the current flowing through the coil. Wrap the coil tightly around the iron piece. Increase the current or voltage.
Detailed explanation-2: -As the soft iron core is a highly ferromagnetic material, It allows (and attracts) the magnetic field lines to pass through it. When such material is used in the electromagnet, the magnetic field lines passing through it increases, thereby, the strength of the electromagnet increases.
Detailed explanation-3: -There are two methods by which we can increase strength of magnetic field are: 1) By increasing the number of turns of wire in the coil. 2) By increasing the current flowing the coil.
Detailed explanation-4: -Soft iron core allows the magnetic field lines to pass through it easily leading to stronger magnetic field.