A small solenoid (radius ra) is inside a larger solenoid (radius rb>ra). They are coaxial with na and nb turns per unit length, respectively. The solenoids carry the same current, but in opposite directions. Let r be the radial distance from the common axis of the solenoids. if the magenetic flied inside the inner solenoid(r
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A small solenoid (radius ra) is inside a larger solenoid (radius rb>ra). They are coaxial with na...
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