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Standard X
Physics
Bar Magnet
Question

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

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Solution
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Magnetic field lines can be entirely confined within the core of a toroid but not within a straight solenoid. since no two magnetic field lines can intersect, and they are originating and ending at the same point (as it is in a ring) thus they are confined to the core of toroid.

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Similar Questions
Q1
Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid . Why?
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Q2
Which of the following statements are correct?

(A) Electric monopoles do not exist, whereas magnetic monopoles exist.

(B) Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and are confined.

(C) Magnetic field lines are completely confined within a toroid.

(D) Magnetic field lines inside a bar magnet are not parallel.

(E) χ=−1 is the condition for a perfect diamagnetic material, where χ is its magnetic susceptibility.

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Q3
Four identical long solenoids A,B,C and D are connected to each other as shown in the figure. If the magnetic field at the center of A is 3 T, the field at the center of C would be: (Assume that the magnetic field is confined within the volume of respective solenoid.)

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Q4

Light is confined within the core of a simple optical fiber by:


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Q5
Why does toroid have a higher magnetic field than a solenoid?
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