Cobalt, nickel and _______ are magnetic materials.
Iron
Iodine
Nitrogen
Fluorine
Iron is one of the three magnetic elements. The other two are cobalt and nickel.
Which of the following is not a magnetic material?(a) gold(b) nickel(c) iron(d) cobalt
Which the following will be attracted to a magnet? [2 MARKS] Rubber, iron nails, steel pen, wood, cobalt, plastic, nickel
Answer the following questions.
(a) Classify the following substances as magnetic or non-magnetic.
copper, phosphorus, iron, cobalt, soil, water, silver mercury, nickel, wood, oil.
(b) In olden times, how as a magnet placed in a compass?
Why does magnetic field increases the resistivity of all metals except iron , cobalt and nickel ?