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A solenoid 60 cm long and of radius 4.0 ...

A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis, both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire?

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NCERT GUJARATI-MOVING CHARGES AND MAGNETISM -ADDITIONAL EXERCISES
  1. Two concentric circular coils X and Y of radii 16 cm and 10 cm, respec...

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  2. A magnetic field of 100 G (1 G = 10^(-4) T) is required which is unifo...

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  3. For a circular coil of radius R and N turns carrying current I, the ma...

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  4. A toroid has a core (non-ferromagnetic) of inner radius 25 cm and oute...

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  5. A magnetic field that varies in magnitude from point to point but has ...

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  6. A charged particle enters an environment of a strong and non-uniform m...

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  7. An electron travelling west to east enters a chamber having a uniform ...

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  8. An electron emitted by a heated cathode and accelerated through a pote...

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  9. A magnetic field set up using Helmholtz coils (described in Exercise 4...

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  10. A straight horizontal conducting rod of length 0.45 m and mass 60 g is...

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  11. The wires which connect the battery of an automobile to its starting m...

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  12. A uniform magnetic field of 1.5 T exists in a cylindrical region of ra...

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  13. A uniform magnetic field of 0.3 T is established along the positive Z-...

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  14. A circular coil of 20 turns and radius 10 cm is placed in a uniform ma...

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  15. A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of...

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  16. A galvanometer coil has a resistance of 12 Omega and the metre shows...

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  17. A galvanometer coil has a resistance of 15 Omega and the metre shows ...

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