Advertisements
Advertisements
Question
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.
Solution
- A - North pole, B - South pole.
- The north end of the compass is repelled and moves away because a north pole is generated at end A, where current flows anticlockwise and enters the negative pole of the battery.
APPEARS IN
RELATED QUESTIONS
State the direction in which current-carrying freely suspended solenoid rests
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?
Draw magnetic field lines in and around a current-carrying straight solenoid.
Sketch the lines of force of the magnetic field of a solenoid. How does its field compare with that of a bar magnet?
What is a solenoid? Why do we usually keep its diameter small in comparison to its length?
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?
Differentiate between a circular coil and a solenoid.
Draw a neat diagram of a solenoid and name its various components.
Current is flowing through a coil as shown in the figure. Which one of the given figures will correctly depict the magnetic polarity and the direction of the lines of force along the axis of the coil?
