Magnetism

Question 1

Magnet discovered by

Answer 1

Sheperd, name magnus, gorrelu kase athanu, cheppulu arigipokunda undataniki , iron ni kinda vestaru kirru cheppulu antaru alage stick ki kuda kinda iron untadi dani help tho paiki ekkutharu, oka stone meda kurchunte antukoni poindi akkada nundi anukunaru,
Magents also called as load stones.
Kising stones chumbakalu
Earth is also a one type of magnet proved by William gilbert

Question 2

Natural magnets

Answer 2

The magnets which available freely in the nature
Load stone magnetite fe2o4
Generally natural magents are weak magnets

Question 3

Artificial magents

Answer 3

The magents which are made by the human beings are called artificial
Bar magent n and s the length of the magent 2l
Used in Laboratories
Horse shoe magnet u shape,
Oval shaped magnet
Cylindrical magents
Ring magnet electric motor radio speakers
Needle shaped magents used in compass
Artificial magents are strong magentsb
The substance which attracted by the magents are called magentic substances

Question 4

Properties of the magnet

Answer 4

Attractive property. Oka magent ki north and south untadi poless dagara ekuvaga untadi, centre dagara attractive property zero untadi
Directional property
Freely suspended maget always shoes north and south directions only,
Pole theorem
Unlike poles are attract each other, like poles are repel each other
Pole pair theorem
Oka magnet ni cut chesthe north and south avuddi malli north and south avuddii, monopoles does not exist only dipoles are exist

Question 5

Magnetisation

Answer 5

The process of converting magnetic substance into magnets, fe, co, ni
Types of magentisation,
Single touch method,
Double touch method.
Electric method most suitable method.

Question 6

Electric method

Answer 6

Substance ni teskoni chutti copper wire chutti dc current ni apply chestam
Dc current is passed in electric method,
Permanent and temporary
Temporary magents soft iron / malleable iron used.
Permanent magents alnico substance is used instead of steel is used

Question 7

Magnetic theory proposed by

Answer 7

Weber
Molecular theory of magnet by eving

Question 8

Magnetic field lines

Answer 8

Magentic field lo north nundi south ki velthu untaii,
Magentic field lines closely looped dagaraga untai and curved lines and parallel to each other and never intersect,
Direction always north to south,

Question 9

Demagnetisation

Answer 9

It is a process of convert magent into magnetic substance
Heating
Hammering
Touching.
By passing ac current

Question 10

Couloumb iinverse law

Answer 10

2 magents konchem duram lo petti, vati madya attractive leda repulsive force , adi directly proportional to the pole strength and inversely proportional to square of distance bt them
K is the constant
K ante u0 / 4 π
Mu absolute medium permeability
4π*10 ^-7

Question 11

Geo magetism

Answer 11

William gilbert
Earth kuda oka pedda magnetic prove chesindi william gilbert, earth lopala reverse untai south and north, earth centre lo nickel ferrous untai, avi liquid lo untai avi flow avvadam avall earth ki magentic field vachindi, 20 times the magent of the earth 20 times stronger than fridge magent, extended upto 5lakh 20 k

Question 12

Intensity of magentic field

Answer 12

Mri scanning lo use chestharu
1.5 tesla
Magneto therapy
South vaipu ki padkunte magentic north untadi, magnet prakaram north nundi south ki velthuntai mana brain meda