you are given three identical looking bars one of which is a manget ,the other made of magnetic material and the third made of a non mangetic material . using just these three bars how will you find out which is which ?
Answers
There is a Magnetic bar, Metalic bar and non metalic bar.
As we know , magnet attracts metal so we can Identify the Metalic bar.
Magnet doesnot attract non magnetic so we can find out The non metalic bar.
but you can understand which bar attracts other pole and the pole bar is Magnetic bar. as magnets attraction is in pole.
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Explanation:
The magnet with known poles will attract and repel two ends of the unmarked magnet. This way, we will be able to identify the magnet bar and iron bar.
Steps to be followed are:
(i) Take the bar magnet with known poles in your hand.
(ii) Take one of the other two iron bars in another hand.
(iii) Bring one side of the iron bar towards the South pole of the bar magnet and note down whether it is
attracted or repelled.
(iv) Bring another side of the iron bar towards the South pole of the bar magnet and again note down the same
thing.
(v) If there is an attraction in both cases (iii) and (iv), then it is definitely a simple iron bar.
(vi) If there is an attraction in one case and repulsion in another case, then it is a bar magnet.
(vii) Do the same for the third iron bar.
To find out the poles:
If in case (iii), the bar is attracted, then it is the North pole of the unmarked bar magnet. If the bar is repelled, then it is obviously a South pole of the identified bar magnet.