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प्रश्न
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.
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उत्तर
When a current is run via a solenoid, it acts like a bar magnet. Its opposite end functions as the magnetic South Pole and its opposite end as the magnetic North Pole. The magnetic field produced resembles that of a bar magnet. In other words, the field lines appear from one end and merge into another, much like a bar magnet.
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संबंधित प्रश्न
State the direction in which current-carrying freely suspended solenoid rests
The adjacent diagram shows a small magnet placed near a solenoid AB. Current is switched on in the solenoid by pressing the key K.
- State the polarity at the ends A and B.
- Will the magnet be attracted or repelled? Give a reason for your answer.
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.
Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.
Which of the following diagrams correctly shows the magnetic field produced by a current-carrying wire?
The diagram below shows a magnet moved near a coil along its axis. Which of the diagram shows correct flow of current during this motion?
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.
A circuit contains a battery, a variable resistor and a solenoid. The figure below shows the magnetic field pattern produced by the current in the solenoid.
- State how the magnetic field pattern indicates regions where the magnetic field is stronger.
- What happens to the magnetic field when the current in the circuit is reversed?
Ansari Sir was demonstrating an experiment in his class with the setup as shown in the figure below.
A magnet is attached to a spring. The magnet can go in and out of the stationary coil. He lifted the Magnet and released it to make it oscillate through the coil.
Based on your understanding of the phenomenon, answer the following question.
Is there any difference in the observations in the galvanometer when the Magnet swings in and then out of the stationary coil? Justify your answer.
Refer to the image below and state how the magnetic field pattern indicates regions where the magnetic field is stronger outside the magnet. What happens to the magnetic field when the current in the circuit is reversed?
