Question

What will be the magnetic lines of forces because of the horizontal component of the magnetic field of earth?
A. Circular
B. Elliptical
C. Curved
D. Horizontal and parallel

Answer 1

Hint: As it is the horizontal component of the magnetic field of the earth, therefore, it will be the horizontal and parallel to the surface of the earth and the field lines will produce the direction. And at a particular point on the earth field will be almost uniform. This will help you in answering this question.

Complete answer:
As it is the horizontal component of the magnetic field of the earth. Therefore, it will be horizontal and parallel to the surface of the earth and the field lines will produce the direction. Therefore, the field lines will also be horizontal and parallel to the surface of the earth. And at a particular point on the earth field will be almost uniform. Hence the field lines will be parallel to each other. Therefore the correct answer has been found.

Hence the answer has been obtained as option D.

Note:
In the situation of a magnetic field, as no isolated unit pole has ever been found, therefore the field lines are known as the lines of force. A small magnet is forced to orient itself in the direction of these field lines. An electric charge traveling along a magnetic field line will undergo no magnetic force. There are some general properties for the magnetic field. They will not take the path of least resistance between the opposite magnetic poles. They will never cross one another and also they all have the identical strength. The density of the magnetic lines of force will decrease, that is they spread out if they move from an area of higher permeability to an area of lower permeability.