Advertisements
Advertisements
Question
What does the divergence of magnetic field lines near the ends of a current carrying straight solenoid indicate?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
State the direction in which current-carrying freely suspended solenoid rests
State two ways by which the magnetic field due to a current carrying solenoid can be made stronger.
Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.
How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid?
A current carrying solenoid behaves like a ______.
A current carrying solenoid when freely suspended, it always rests in ______ direction.
- 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).
Draw the pattern of magnetic field lines of a solenoid through which a steady current flows. What does the pattern of field lines inside the solenoid indicate?
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.
What is a solenoid? Why do we usually keep its diameter small in comparison to its length?
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 diagram below shows a magnet moved near a coil along its axis. Which of the diagram shows correct flow of current during this motion?

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

- What are the magnetic poles at A and B when the key K is closed?
- State two ways to increase the strength of the magnetic field in this coil without changing the coil.
- 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?
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.
Differentiate between a circular coil and a solenoid.
