17) What will happen if a bar magnet is broken/cut into two pieces ?

Each piece will become a separate magnet having north and south pole

Magnetic property will be destroyed in both the pieces completely

Longer piece only will have magnetic property with north and south pole on either end

One piece will have only north pole and the other piece will have only south pole

Answer is:

Each piece will become a separate magnet having north and south pole

increase

decrease

becomes zero

remain same

Answer is:

Alnico

Manganese

Copper

Bismuth

Answer is:

Explanation:

Alnico is having higher retentivity of magnetism.

electromagnets

permanent magnets

bar magnets

para magnets

Answer is:

Heating effect

Magnetic effect

Chemical effect

Thermal effect

Answer is: