schoolscienceproject.blogspot.in
Mysterious circles
Push a length of
copper wire through a piece of cardboard laid horizontally and connect the ends
of the wire to a battery. Scatter iron filings on to the cardboard and tap it
lightly with your finger. The iron filings form circles round the wire. If a
direct current is passed through a wire or another conductor, a magnetic field
is produced round it. The experiment would not work with an alternating
current, in which the direction of the current changes in rapid sequence,
because the magnetic field would also be changing continuously.
No comments:
Post a Comment
schoolscienceproject.blogspot.in