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The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.(a) 18.84T(b) 18.84mT(c) 1.84T(d) 1.84mT |
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Answer» The correct option is (b) 18.84mT The best explanation: The magnetic field in a solenoid is given by: B=μnI Substituting the values in the given values in the equation, B=18.84mT. |
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