Question

define the following
a)magnetic field (ii)magnetic line of force
2) where is the Earth magnetic field :
a)strongest (b)weakest?
3) why does a freely suspended magnetic magnetic needle points in geographical north south direction ?
4)state four characteristic of the the magnetic lines of force .
5) briefly describe the structure of magnetic compass also state two uses of magnetic compass.
6) how can you say is a huge magnet ?
7) right true aur Falls for the following :
(i) magnet can be made by passing current around any material
ii) when a magnet is broken every piece of it is a complete magnet
iii) Steel pieces are used a magnet keeper
IV) the magnetic compass is placed in a circular Nickel case .
V) magnetic lines of force directed from north pole to South Pole outside the magnet
8) fill in the blanks:
i) a device used by sailars to find the direction in in which their ship in movie is known as________
ii) the power of attraction of a ______
magnet in twice compare similar bar magnet
iii) magnetic lines of force are highly concentrated at ____
IV) _______ determine the strength of magnetic field

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Answer 1

Answer:

a)he use of magnetic fields to generate electric current .b)Magnetic Lines of Force is a an imaginary line representing the direction of magnetic field such that the tangent at any point is the direction of the field vector at that point.

2:a)strongest

3): A freely suspended magnet always rests in the north-south direction because the magnetic south pole of the earth lies in the geographic north direction and the magnetic north pole of the earth lies in the geographical south direction.

4)They never cross one another. They all have the same strength. Their density decreases (they spread out) when they move from an area of higher permeability to an area of lower permeability. Their density decreases with increasing distance from the poles.

5)A compass is a small box with a glass cover on it. A magnetized needle is pivoted inside the box, which can rotate freely. The compass has a dial with directions marked on it.

6)I think, Earth.

7:1)T

2)T

3)T

4)T

5)T

8:i)magnetic compass

ii)horse-shoe

iii)its north-seeking and south-seeking poles

iv)the distance from the field source and by the initial strength of the magnet itself.

Explanation: