Which option is the right option for magnet materials?
a) nickel
b) cobalt
c) iron
d) all of these
The Greeks found load stones over;
a) 1000 years ago
b) 2000 years ago
c) 3000 years ago
d) 4000 years ago
The North pole of a bar magnet is painted:
a) Red
b) Blue
c) White
d) black
The south pole of a bar magnet is painted:
a) Red
b) Green
c) Blue
d) Yellow
