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प्रश्न
Under what conditions permanent electromagnet is obtained if a current carrying solenoid is used? Support your answer with the help of a labelled circuit diagram.
उत्तर
The following conditions are required to obtain permanent electromagnet when a current-carrying solenoid is used :
- Rod inside the solenoid should be made of a magnetic material like steel which should retain magnetic properties for a long time after magnetization.
- The current through the solenoid should be direct current.
- The number of turns in the solenoid should be large and closely packed so that a strong uniform magnetic field inside it is produced.
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संबंधित प्रश्न
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?
Draw a diagram to represent the magnetic field lines along the axis of a current carrying solenoid. Mark arrows to show the direction of current in the solenoid and the direction of magnetic field lines.
What effect will there be on a magnetic compass when it is brought near a current carrying solenoid?
- 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).
The magnetic field lines outside a bar magnet:
Which of the following diagrams correctly shows the magnetic field produced by a current-carrying wire?
The pattern of the magnetic field produced by the straight current-carrying conducting wire is ____________.
When does a solenoid behave as a magnet? Draw the pattern of the magnetic field produced inside it showing the directions of the magnetic field lines.
Differentiate between a circular coil and a solenoid.
Draw a neat diagram of a solenoid and name its various components.
