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प्रश्न
- What name is given to a cylindrical coil of diameter less than its length?
- If a piece of soft iron is placed inside the coil mentioned in part (a) and current is passed in the coil from a battery, what name is then given to the device so obtained?
- Give one use of the device mentioned in part (b).
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उत्तर
- Solenoid is a cylindrical coil of diameter less than its length.
- The device so obtained is electromagnet.
- It is used in electric bell.
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संबंधित प्रश्न
Why does a current carrying, freely suspended solenoid rest along a particular direction?
The figure shows a solenoid wound on a core of soft iron. Will the end A be a N pole or S pole when the current flows in the direction shown?
The following diagram shows a spiral coil wound on a hollow carboard tube AB. A magnetic compass is placed close to it. Current is switched on by closing the key.
- What will be the polarity at the ends A and B?
- How will the compass needle be affected? Give reason.
What effect will there be on a magnetic compass when it is brought near a current carrying solenoid?
How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid?
The magnetic field lines outside a bar magnet:
Which of the following diagrams correctly shows the magnetic field produced by a current-carrying wire?
What does the divergence of magnetic field lines near the ends of a current carrying straight solenoid indicate?
Observe the given figure of a current-carrying solenoid and write the labels of A and B correctly.
Differentiate between a circular coil and a solenoid.
