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Magnetic field lines can be entirely con...

Magnetic field lines can be entirely condined within the core of toroid , but not within a straight solenoid . Why?

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Magnetic field lines can be entirely confined within the core of a toroid since toroid has no ends. `theta` solenoid is open ended and the field lines inside it which are parallel to the length of the solenoid cannot form closed curves inside the solenoid .
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a. Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns (at the point) Do the magnetic field also represent the lines of force one a moving charged particle at every point ? b. Magnetic field lines can be entirely confined within the core of a toroid , but not within a straight solenoid. Why ? c. If magnetic monopoles existed, how would the Gauss ' law of magnetism be modified ? d. Does a bar magnet exert a torque on itself due to its own field ? Does one element of a current - carrying wire exert a force on another element of the same wire ? e.Magnetic field arises due to charges in motion . Can a system have magnetic moments eventhough its charge is zero ?

Magnetic field lines always repel each other and do not intersect

Knowledge Check

  • The magnetic field inside a solenoid is

    A
    directly proportional to current
    B
    inversely proportional to current
    C
    directly proportional to its length
    D
    inversely proportional to the total number of turns

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