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Relative Strength of Magnetic Field Inferred from Magnetic Field Lines

33.A solenoid...

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33.A solenoid of length 0.04m and radius 0.02m with 100 turns lies inside on the axis of a long solenoid,0.8m length and 1500 turns.Obtain the mutual inductance of the two solenoids.

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Q. A short solenoid of length

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