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What does the divergence of magnetic field lines near the ends of a current carrying straight solenoid indicate? - Science

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प्रश्न

What does the divergence of magnetic field lines near the ends of a current carrying straight solenoid indicate?

एका वाक्यात उत्तर

उत्तर

The divergence of magnetic field lines or the falling degree of closeness of magnetic field lines near the ends of a current-carrying straight solenoid indicates the decrease in strength of the magnetic field.

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पाठ 13: Magnetic Effects of Electric Current - Short Answer Questions [पृष्ठ १००]

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एनसीईआरटी एक्झांप्लर Science [English] Class 10
पाठ 13 Magnetic Effects of Electric Current
Short Answer Questions | Q 20. | पृष्ठ १००

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.


State the direction in which current-carrying freely suspended solenoid rests


What effect will there be on a magnetic compass when it is brought near a current carrying solenoid?


What is a solenoid?


Derive the expression for the heat produced due to a current ‘I’ flowing for a time interval ‘t’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. With which name is the relation known? How much heat will an instrument of 12W produce in one minute if it is connected to a battery of 12V?


The diagram shows a current-carrying coil passing through a cardboard sheet. Draw three magnetic lines of force on the board.

State two factors on which magnitude of magnetic field at the centre depends.


The adjacent diagram shows a small magnet placed near a solenoid. State whether the magnet is attracted or repelled, as the switch is pressed. Give a reason.


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.


The diagram below shows an insulated copper wire wound around a hollow cardboard cylindrical tube. Answer the questions that follow:

  1. What are the magnetic poles at A and B when the key K is closed?
  2. State two ways to increase the strength of the magnetic field in this coil without changing the coil.
  3. If we place a soft iron bar at the centre of the hollow cardboard and replace the DC source with an AC source then will it attract small iron pins toward itself when the current is flowing through the coil?

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?


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