Which of the following can never be picked up by a magnet?
A) cobalt
B) copper
C) iron
D) nickel
E) unmagnetised steel
[J91/P1/Q13]
One end of X of a metal rod attracts the N pole of a compass needle .This shows the rod could be
A. made of steel with a N pole at X .
B.made of steel but may be either unmagnetised or with a N pole at X.
C.made of steel but may be either unmagnetised or with a S pole at X.
D.made with copper previously stroked with a magnet whose S pole last made contact with end X .
E.made of copper previously stroked with magnet whose N pole last made contact with end X .
[D88/P1/Q14]
A, B D, ferrous metals have iron, hence magnets can pick them up.