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प्रश्न
How will you test whether a given rod is a magnet or not ?
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उत्तर
Aim— To test whether a given rod is a magnet or not.
Apparatus —
- rod to be tested
- a bar magnet
- a stand
- a thread
Procedure —
- Suspend the rod to be tested with a thread on the stand.
- Bring the bar magnet near the rod with its north pole towards the rod’s end.
- Observe.
Inference — In every case, the magnet comes to rest in a north- south direction which shows its directive property.
Observation and Inference —
— If the rod is attracted towards the bar magnet, the rod may be magnet or not.
— But if the rod remains in the same direction of rest as in the start of the experiment, it show it is not a magnet.
APPEARS IN
संबंधित प्रश्न
Describe a simple experiment to illustrate that like poles of two magnets repel each other while the unlike poles attract ?
State if the following statement is true or false. Correct the statement if it is false.
Whenever a magnet is not in use, it should be stored along with other magnets.
How will you do this?
Determine whether a material is magnetic or non-magnetic.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
Draw the magnetic flux pattern near a bar magnet placed with its axis in the magnetic meridian and the south pole pointing towards geographic north.
Define the following term:
Angle of dip
Give scientific reason:
Soft iron is used to make electromagnets.
Give scientific reason:
Not attraction but repulsion is a sure test of magnetism.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
