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प्रश्न
How will you test whether a given rod is a magnet or not ?
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
Fill in the blank
Like poles ______ each other and unlike poles _____
Match the following
| Column A | Column B |
| (a). Human body | (1). electric bell |
| (b). Silk thread | (2). current |
| (c). Charge in motion | (3). conductor |
| (d). soft iron | (4). electromagnet |
| (e) . Electromagnet | (5). insulator |
You are given two similar bars. One is a magnet and the other is of soft iron. How will you distinguish and identify them ?
You are given a magnet. How will you use it to find north-south direction at a place?
Match the following
| Column A | Column B |
| A) Steel | 1) to store magnets |
| B) Soft iron | 2) temporary magnet |
| C) Use in electric bell | 3) permanent magnet |
| D) Magnetic keepers | 4) electromagnet |
Answer the following in short.
What is a magnet? Differentiate between natural and artificial magnets.
Define the following term regarding a bar magnet:
Magnetic field
Answer the following in detail.
How can a magnet be demagnetized?
Describe, how you will proceed to determine the position of the pole of a bar magnet.
