Question

what are magnetic field lines ?
justify the following statements

a.) two magnetic field lines never intersect each other

b.) magnetic field lines are closed curves

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Answer 1

Answer:

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Explanation:

MAGNETIC FIELD LINES:- A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetized materials. A charge that is moving in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field....

a) Any point on magnetic field line indicates the direction of force on a North pole kept there. If two lines meet, it means that force is acting in two directions at that point which is not possible....

a) Magnetic field lines are closed curve because magnetic monopoles do not exit. Outside a magnet direction of magnetic field, lines are from north to the South Pole and inside a magnet the direction if from south to north, hence forming a closed loop....

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Answer 2

$\color{blue}{ANSWER}$

The path traced by a North magnetic pole free to move under the influence of a magnetic field is called a magnetic field line.

(a) The magnetic field lines do not intersect or cross one another. This is due to the fact that the resultant force on a North Pole at any point can be only in one direction. But if the two magnetic field lines intersect one another, then the resultant force on a North Pole placed at the point of intersection will be along to directions, which is not possible.

(b) Magnetic field lines are closed curves or forms a closed loop. This is because two magnetic field lines can never intersect. And forming closed curves enable the lines to run different from each lines and not intersect to each other.

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