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Compare the magnetic fields due to a str...

Compare the magnetic fields due to a straight solenoid and a bar magnet.

Text Solution

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Both the fields are identical. A long straight current carrying solenoid bahaves as a bar magnet having dipole moment `vecm = N I vecA`
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Knowledge Check

  • Magnetic field produced by a solenoid and a bar magnet

    A
    similar
    B
    different
    C
    sometimes similar and sometimes different
    D
    none of these

  • The magnetic field due to a bar magnet _____

    A
    has the same direction at any point
    B
    is uniform
    C
    is non-uniform
    D
    does not exist

  • The magnetic field inside a long straight solenoid carrying current

    A
    is zero
    B
    decreases as we move towards its end
    C
    increases as we move towards its end
    D
    is the same at all points

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    (a)Using Ampere's circuital law,obtain the expression for the magnetic field due to a long solenoid at a point inside the solenoid on its axis. (b)In what respect is a toroid different from a solenoid?Draw and compare the pattern of the magnetic field lines in the two cases. (c)How is the magnetic field inside a given solenoid made strong?

    The magnetic field inside a long straight solenoid-carrying current.

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