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The figure shows a solenoid wound on a c...

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 ?

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The correct Answer is:
N/a
S-pole
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At a small distance from a solenoid carrying a current thero is placed a contour with a current in such a manner that the solenoid's axis lies in the plane of the contour. The directions of the currents in solenoid and contour are shown by arrows. How docs the contour move? I-Iow will it IJlOVe if the current in it flows in the direction opposite to the one shown in the figure?

Two long coaxical insulated solenoid's S_1 and S_2 of equal lengths are would one over the other as shown in figure. A steady current 'T' flows through the inner solenoid S_1 to the other end B, which is connected to the outer solenoid S_2 through which the same current flows in opposite direction so as to come out at end A. If n_1 and n_2 are the number of turns per unit length, find the magnitude and direction of net magnetic field at a point (i) inside on the axis and (ii) outside the combined system.

(a) State Ampere's circuital law, expressing it in the integral form. (b) Two long coaxial inlsulated soenoids, S_(1) and S_(2) of equal lengths are would one over the other as shown in the figure. A steady current ''I'' flows through the inner solenoid S_(1) to the other end B, which is connected to the outer solenoid S_(2) through which the same current ''I'' flows in the opposite direction so as the come out at end A. If n_(1) and n_(2) are the number of turns per unit length, find the magnitude and direction of the net magnetic field at a point (i) inside on the axis and (ii) outside the combined system.

A solenoid is a long helical coil of wire through which a current is runs in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic field with respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere. Which of the following statement is correct if a soft iron bar is placed inside the solenoid?

A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic field with respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere. What will happen if a soft iron bar is placed inside the solenoid?

LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. The back face of a circular loop of wire is found to be south magnetic...

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  2. In the straight wire A, current is flowing in the vertically downward ...

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  3. The figure shows a solenoid wound on a core of soft iron. Will the end...

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  4. A current-carrying straight wire is held in exactly vertical position....

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  5. For the coil in the diagram below, when the switch is pressed : (a) ...

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  6. A current flows downwards in a wire that passes vertically through a t...

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  7. The directions of current following in the coil of an electromagnet at...

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  8. A current-carrying conductor is held in exactly vertical direction. In...

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  9. A thick wire is hanging from a wooden table. An anitclockwise magnetic...

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  10. What produces magnetism in the human body ?

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  11. What is the full form of MRI ?

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  12. When is the force experienced by a current-carrying conductor placed i...

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  13. When is the force experienced by a current-carrying conductor placed i...

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  14. In a statement of Feming's left-hand rule, what do the following repr...

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  15. Name one device which works on the magnetic effect of current.

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  16. Name the device which converts electrical energy into mechanical energ...

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  17. A motor converts one form of energy into another. Name the two forms.

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  18. State whether the following statement is true or false : An electric...

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  19. For Fleming's left-hand rule, write down the three things that are 90^...

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  20. What is the other name of the split ring used in an electric motor ?

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