Who among the following was the first to use magnets for surgical purposes?
Fleming
Charaka
Sushrutha
Aristotle
A magnet is surrounded by
Magnetic field
Electric field
Poles
Radiations
The attractive property of a magnet is concentrated at
The centre
Laterally
Ends
Equally throughout the surface
Select the substance different from others
Copper
Iron
Aluminium
Silver
Which of the following affect the magnetic property of a substance?
Altitude
Temperature
Colour
Humidity
The process by which a magnet loses its magnetic property is called
Degradation
Dehydration
Decomposition
Demagnetisation
The substance having magnetic property is
Wooden pieces
Chalk
Iron Nail
Ice Cube
Which of the following gas exhibit magnetic property when cooled to liquid state?
Oxygen
Hydrogen
Helium
Nitrogen
Choose the correct statement
North and South Poles repel each other
South Pole attracts South Pole
North and South Poles in a magnet cannot be separated
Natural magnets are more powerful than artificial magnets
The substances that are strongly attracted by magnets are called
Insulators
Conductors
Atoms
Magnetic substances
