EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A magnetic field is the area around a magnet where a force is exerted on certain objects.
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A magnetic field is an area of land where magnets are found.
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Magnetic field lines are strongest around the middle of the magnet.
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Magnetic field lines spread out of the north end of the magnet.
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Magnetic fields are three-dimensional and resemble a bubble.
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Detailed explanation-1: -Answer: The correct answers are “A magnetic field is the area around a magnet where a force is exerted on certain objects", “Magnetic field lines spread out of the north end of the magnet” and “Magnetic fields are three-dimensional and resemble a bubble".
Detailed explanation-2: -Magnetic field lines are imaginary lines that are used to represent the direction of magnetic field by the tangent at a point. Magnetic field lines run from north pole to south pole outside the magnet and from south pole to north pole inside the magnet. Magnetic field line never intersect.
Detailed explanation-3: -Magnetic (and electric) fields are often challenging to teach and understand because they exist in three dimensions.
Detailed explanation-4: -Magnetic field lines never intersect with each other. Magnetic field lines form a closed-loop. Field lines have both direction and magnitude at any point on the field. Therefore, magnetic field lines are represented by a vector.