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A closely wound solenoid of 2000 turns a...

A closely wound solenoid of 2000 turns and area of cross-section `1.6 xx 10^(-4)m^(2)?` carrying a current of 4.0 A. is suspended through its centre allowing it to turn in a horizontal plane.
(a) What is the magnetic moment associated with the solenoid?
(b) What is the force and torque on the solenoid if a uniform horizontal magnetic field of `7.5 xx 10^(-2)T` is set up at an angle of `30^@` with the axis of the solenoid?

Answer

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A closely wound solenoid of 2000 turns and area of cross section 1.6 xx 10^(-4) m^(2) , and carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the the magnetic moment asociated with the solenoid ?

A closely wound solenoid of 2000 turns and area of cross section 1.6 xx 10^(-4) m^(2) , and carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 xx 10^(-2) T is set up at an angle of 30^(@) with the axis of the solenoid ?

Knowledge Check

  • The magnetic field inside the solenoid is

    A
    Non uniform
    B
    Variable
    C
    Same at all points
    D
    Zero

  • A solenoid of inductance 2 H carries a current of 1 A. What is the magnetic energy stored in a solenoid ?

    A
    4 J
    B
    2 J
    C
    5 J
    D
    1 J

  • A straight wire of mass 200 g and length 1.5 m carries a current of 2 A . It is suspended in mid-air by a uniform horizontal magnetic field vec(B) (fig.). What is the magnitude of the magnetic field ?

    A
    0.65 T
    B
    0.56 T
    C
    6.5 T
    D
    5.6 T

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