Advertisements
Advertisements
Question
For the current carrying solenoid as shown, draw magnetic field lines and give reason to explain that out of the three points A, B and C, at which point the field strength is maximum and at which point it is minimum?

Advertisements
Solution

- Magnetic field strength outside of the solenoid is minimal. The magnetic field strength at the ends of the solenoid is half that inside. Field strength is thus:
Minimum - at point B; Maximum - at point A.
RELATED QUESTIONS
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?

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.

State two ways by which the magnetic field due to a current carrying solenoid can be made stronger.
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.
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.
The pattern of the magnetic field produced by the straight current-carrying conducting wire is ____________.
The factors on which one magnetic field strength is produced by current-carrying solenoids depends are
What does the divergence of magnetic field lines near the ends of a current carrying straight solenoid indicate?
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?
