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A current -carrying loop of irregular shape is located in an external magnetic field. If the wire is flexible, why does it becomes circular?

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Knowledge Check

  • A current carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon

    A
    area of loop
    B
    value of current
    C
    magnetic field
    D
    None of these
  • AAKASH SERIES-ELECTROMAGNETIC INDUCTION-Exercise (Short Answer Questions)
    1. A current -carrying loop of irregular shape is located in an external ...

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    2. A circular loop of wire is carring a current i (as shown in the figure...

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    3. Figures 1 and 2 show planar loops of different shapes moving out or in...

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    4. Use Lenz's law to determine the direction of induced current in the si...

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    5. A conducting loop is held stationary normal to the field between the N...

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    6. (a) A closed loop is held stationary in the magnetic field between the...

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    7. (a) A closed loop is held stationary in the magnetic field between the...

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    8. (A): An induced current develop in a conductor moved in a direction pa...

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    9. An iron bar falling vertically through the hollow region of a thick cy...

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    10. A small resistor (say, a lamp) is usually put in parallel to be curren...

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    11. The figure shows a circuit. When the circuit is switched on, the amm...

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    12. As soon as current is switched on in a high-voltage wire, the bird sit...

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    13. A wire of fixed length is wound on a solenoid of length 'l' and radius...

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    14. (A) : A spark occur between the poles of a switch when the switch is o...

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    15. The figure shows the magnetic field of a current carrying coil and a r...

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    16. A copper ring is suspended by a thread. One end of a magnet is brought...

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    17. A: When a bar magnet is dropped into a vertical long hollow metallic t...

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    18. In the above problem if block is released from there, what would be ma...

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    19. A lamp in a circuit consissing of a coil of large number of turns and ...

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    20. The magnitude of electric current is increasing in a wire at a constan...

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