Which materials are used in making magnetic compass needle?

What type of magnetic material is used in making permanent magnets ?

Which material is used in manufacture of toys, combs ?

Error due to non-removl of parallax between pointer and its image in case of magnetic compass needle causes_____.

Why should the materials used for making permanent magnets have high coercivity ?

Which is the material used in making the core of a moving coil galvanometer?

Fibre used in making magnetic recording tape is _______.

What kind of ferromagnetic material is used for coating magnetic tapes in a cassette player, or for building 'memory stores' in modern computer ?