7 magents i hate you go away Flashcards
Magnets exist naturally in the form of?
lodestones
Man-made magnets are made from?
iron, steel, cobalt, nickel
What are properties of magnet
Attract magnetic material
Has pole (north & south)
Like poles repel, unlike poles attract
Freely suspended magnet shows north-south direction
What is magnetic field
Area around the magnet with magnetic force
What are characteristics of magnetic field lines
Never meet or cross
Begin from north & end at south
loser to one another where magnetic field is stronger
What is a neutral region
Magnetic field between two like poles which is free from the effect of any magnetic force
What is use of iron fillings and compass to determine a magnet’s characteristic
Iron filling -> Pattern of Magnetic field
Compass -> Direction
What is the direction of compass when placed close to magnet
Top & bottom -> opposite of magnet
Left & right -> same direction of magnet
What is an electromagnet
Magnet that has temporary magnetic effect when electric current flows through it
Pattern of magnetic field depends on
Shape of conductor
Magnetic field lines of straight wire & coiled wire is
Concentric circles
Strength of the magnetic field of electromagnet will reduce when?
Moved away from the centre of conductor
How is direction of magnetic field determined
Right-hand grip rule
What is the right-hand grip rule
Thumb -> Direction of current
Direction of 4 fingers -> Direction of magnetic field
What are types of conductors using wire
Straight wire
Coiled wire
Solenoid
