5 magnetism acts through non-magnetic materials.
a) true
b) false
c) none
d) both a and b
6. the strength of the south pole of a magnet is
a) less than
b) greater than
the strength of its north pole.
c) equal to
d) none
poles repel each other.
7.
a) like
b) un-like
c) both a and b
d)none
8. most of the magnetic power appears to be concentrated at certain points of a magnet. these points are
called
a) keepers
c) centre
b) inductors
d) poles
9. wherever an electric current exists, a magnetic field cannot exist.
a) true
c) both a and b
bi false
d) none
10. unlike magnetic poles create a force of attraction.
al true
b) false
c) both a and b
d) none
1. materials such as copper, brass, and aluminum are called ferro-magnetic materials
a) true
b) false
c) both a and b
d) none