What will be the magnetic field at any point lying outside a long solenoid of very small radius?
A
Similar to in region inside the solenoid
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B
Can be approximated to zero
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C
Very large and close to infinity
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D
cannot be detrmined
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Solution
The correct option is B Can be approximated to zero The field at any point lying outside the region occupied by a solenoid of very small radius is zero. Can you figure out why?
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