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A long solenoid has 500 turns per cm and carries a current I. The magnetic field at its center is 7.54 × 10-2 Wb m-2. Another long solenoid has 300 turns per cm and it carries a current \(\frac {I}{3}\). What is the value of magnetic field at the center?

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A long solenoid has 500 turns per cm and carries a current I. The magnetic field at its center is 7.54 × 10<sup>-2</sup> Wb m<sup>-2</sup>. Another long solenoid has 300 turns per cm and it carries a current \(\frac {I}{3}\). What is the value of magnetic field at the center?






 
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