Unlike poles attract each other and like poles repel each other. Materials attracted by magnets are magnetic materials. A compass needle and a freely suspended magnet align along the north-south direction, and every magnet has two poles.
(i) attract; repel (ii) magnetic materials (iii) north-south (iv) two
A single magnetic pole cannot be obtained by breaking a magnet; each piece again has both poles. Similar poles repel. Iron filings collect mostly near the poles, not the middle. A freely suspended bar magnet aligns along the north-south direction.
(i) False (ii) True (iii) False (iv) True
Like poles repel each other, so N-N and S-S give repulsion. Unlike poles attract each other, so N-S and S-N give attraction.
N - N: Repulsion; N - S: Attraction; S - N: Attraction; S - S: Repulsion.
- i. Position A: 10, Position B: 2, Position C: 10
- ii. Position A: 10, Position B: 10, Position C: 2
- iii. Position A: 2, Position B: 10, Position C: 10
- iv. Position A: 10, Position B: 10, Position C: 10
The attractive strength of a bar magnet is greatest near its two poles and weakest near the middle. In the figure, A and C are near the ends of the bar magnet, while B is near the middle. Therefore more U-clips are attracted at A and C than at B.
Option (i) is likely: Position A: 10, Position B: 2, Position C: 10.
A piece of iron is attracted by a magnet but does not repel it. Repulsion is the sure test of magnetism because it occurs only between like poles of two magnets. Therefore the pair that can repel each other must be the two magnets.
She should test the bars pairwise by bringing their ends close to each other. The two bars that show repulsion for some arrangement of their ends are the magnets. The remaining bar is the piece of iron.
Like poles repel and unlike poles attract. Comparing each end of the unmarked magnet with a marked pole identifies its polarity.
Bring the marked North pole of the known magnet near one end of the unmarked magnet. If that end is repelled, it is the North pole. If it is attracted, it is the South pole. The other end will be the opposite pole.
A freely suspended bar magnet rests along the north-south direction. Its north-seeking end is called the North pole.
Suspend the bar magnet freely using a thread and let it come to rest. The end that points towards the north direction is the North pole of the magnet.
Unlike poles attract. Since the North pole of the compass needle is attracted towards geographic north, that region must act like a magnetic south pole.
Yes. The north-seeking end of a compass points towards geographic north, so the region near Earth's geographic north behaves like the South pole of Earth's magnet. The region near Earth's geographic south behaves like the North pole of Earth's magnet.
Steel is a magnetic material. A magnetised screwdriver tip attracts steel screws, preventing them from falling easily.
The mechanic can magnetise the tip of the screwdriver by rubbing it repeatedly in one direction with a magnet, or by attaching a small magnet near its tip. The magnetised screwdriver will attract the steel screws and hold them.
Repulsion between like poles can support the upper ring magnet above the lower one. Reversing one magnet changes the facing poles to unlike poles, causing attraction.
Magnet X does not move down because like poles of the two ring magnets are facing each other and repelling. To bring X in contact with Y without pushing, remove one magnet, turn it over, and place it back so that unlike poles face each other. Then the magnets will attract and come together.
End 5 is marked N, so the other end of the same bottom magnet, end 6, is S. The end of the vertical magnet near end 5 must be S for attraction, so end 4 is S and the opposite end 3 is N. The end of the top magnet near end 3 must be S for attraction, so end 2 is S and the opposite end 1 is N.
The polarities are: end 1 - N, end 2 - S, end 3 - N, end 4 - S and end 6 - S.