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प्रश्न
Artificial magnets are made in different shapes such as ______, _____ and _______.
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उत्तर
Artificial magnets are made in different shapes such as Bar-magnet, Horseshoe magnet, and Ring magnet.
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संबंधित प्रश्न
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 ?
“Poles exist in pair”. Comment on this statement ?
Name four appliances which work using electricity ?
Tick the most appropriate answer.
The surest test of magnetism is
State if the following statement is true or false. Correct the statement if it is false.
Attraction is the surest test for magnetism.
Which magnet will you use?
A window shutter opens and shuts continuously in the wind.
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 |
Describe, how you will proceed to determine the position of the pole of a bar magnet.
Since every iron atom is a tiny magnet, why are not all iron bar magnets?
Draw a clearly labelled diagram, to show how a steel bar is magnetised by a divided touch method. A written description is not required.
Explain the mechanism by which unmagnetized iron nails get attracted to a magnet when brought near it.
Define the term Magnetic axis
State three important properties of a magnet.
Define the following term:
Angle of dip
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
With the help of a diagram explain the following:
Magnetisation of steel needle using electric current such that the pointed end should have north polarity.
