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Why should a solenoid tend to contract w...

Why should a solenoid tend to contract when a current passes through it?

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It will contract as current in adjacent turns of solenoid flows in the same direction. So, the different turns attract each other.
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MODERN PUBLICATION-MOVING CHARGES AND MAGNETISM-Revision Exercises (Very Short Answer Questions )
  1. What is the value of magnetic field near the end of a current carrying...

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  2. Which rule is used to find the direction of field produced by a soleno...

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  3. Why should a solenoid tend to contract when a current passes through i...

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  4. Toroid is

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  5. A copper wire of length 7 metre is bent to form a circular loop. If i ...

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  6. What is the shape of the coils for an ideal toroid?

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  7. Magnetic field lines can be entirely confined within the core of a tor...

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  8. Derive an expression for the force between two long parallel current c...

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  9. What type of force is acting between two parallel wires carrying curre...

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  10. If the distance between two parallel current carrying wires is doubled...

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  11. The force exerting between the two parallel current carrying conductor...

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  12. Derive an expression for the force between two long parallel current c...

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  13. What is the torque on a current carrying loop placed in a uniform magn...

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  14. What is the value of torque when magnetic moment (m) and magnetic fiel...

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  15. Two wires of equal lengths are bent in the form of two loops. One of t...

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  16. Magnetic dipole moment of revolving electron is

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  17. What is the correct value of Bohr magneton?

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  18. What is torsional constant of the spring used in a galvanometer?

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  19. What is the condition for steady angular deflection (phi) in moving co...

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  20. What is current sensitivity? State ita SI unit.

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