Question 17
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
Question 17
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
Inorder to make a simple compass, magnetise the iron needle and set it in a way that it will rotate freely when we suspend it.
Steps involved in preparing a magnetic compass are :
(i) Take an iron needle which is to be magnetised.
(ii) Magnetise the iron needle using a bar magnet by continuously rubbing it with the magnet.
(iii) Insert the magnetised needle through a small piece of cork.
(iv) Let the cork float in water taken in a bowl. Make sure that the needle does not touch the water.
(v) Your magnetic compass is now ready to work. Note the direction in which the needle points when the cork is floating.
(vi) Rotate the cork, with the needle fixed inside it, in different directions. Note the direction in which the needle points when the cork begins to float again without rotating (rest position).
You will observe that the needle indicates the North-South direction when it comes to rest as a freely suspended magnet allows points North-South direction.
Inorder to make a simple compass, magnetise the iron needle and set it in a way that it will rotate freely when we suspend it.
Steps involved in preparing a magnetic compass are :
(i) Take an iron needle which is to be magnetised.
(ii) Magnetise the iron needle using a bar magnet by continuously rubbing it with the magnet.
(iii) Insert the magnetised needle through a small piece of cork.
(iv) Let the cork float in water taken in a bowl. Make sure that the needle does not touch the water.
(v) Your magnetic compass is now ready to work. Note the direction in which the needle points when the cork is floating.
(vi) Rotate the cork, with the needle fixed inside it, in different directions. Note the direction in which the needle points when the cork begins to float again without rotating (rest position).
You will observe that the needle indicates the North-South direction when it comes to rest as a freely suspended magnet allows points North-South direction.
