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Question
What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?
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Solution
The magnetic field lines inside a solenoid are in the form of parallel straight lines. This pattern of field lines indicates that the strength of the magnetic field is the same at all points inside the solenoid.
RELATED QUESTIONS
State qualitatively the effect of inserting an iron core into a current-carrying solenoid.
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The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
45°
60°
90°
180°
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45°
60°
90°
180°
A coil ABCD mounted on an axle is placed between the poles N and S of a permanent magnet as shown in Figure.

- In which direction will the coil begin to rotate when current is passed through the coil in direction ABCD by connecting a battery at the ends A and D of the coil?
- Why is a commutator necessary for continuous rotation of the coil?
- Complete the diagram with commutator, etc. for the flow of current in the coil?
A current-carrying conductor is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:
The strength of magnetic field around a current-carrying conductor is ____________.
A copper conductor is placed over two stretched copper wires whose ends ate connected to a D.C. supply as shown in the diagram.
- What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
- Name the law used to find these polarities.

