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Magnetic Field Due to Current Carrying Solenoid

A solenoid co...

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A solenoid coil has 50 turns per cm along its lenght and a cross sectional area of 4cm^2. Now 200 turns of another wire are wounded round the first solenoid coaxially,the coils are electrically insulated from each other. calculate the mutual induc†an ce between the two coils.

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A solenoid coil has 10 turns per cm along its length and a cross sectional area of 10 cm². 100 turns of another wire are wound round the first solenoid coaxially. The two coils are electrically insulated from each other. The mutual inductance between the two coils is

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