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Solenoid

Why outside s...

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Why outside solenoid magnetic fields is zero

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Similar questions

Q. Magnetic field outside a solenoid is:

Why is the net force on a current carrying solenoid in uniform magnetic field equal to zero

Q. Consider the two idealised systems.
(i) a parallel plate capacitor with large plates and small separation and
(ii) a long solenoid of length L

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R, radius of cross-section.
In (i)

\to E

is ideally treated as a constant between plates and zero outside. In (ii) magnetic field is constant inside the solenoid and zero outside. These idealised assumptions, however, contradict fundamental laws as given.

Q. What will be the magnetic field at any point lying outside a long solenoid of very small radius?

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