244Chapt. 32Inductance and Inductorsa) its immanence.b) its resistance.c) its capacitance.d) its inductance.e) the current through it.032 qmult 00300 1 1 2 easy memory: ideal solenoid inductance7. The ideal solenoid has no magnetic field outside and magnetic field insidevectorB=μ0nIˆz,wherenis the number of turns per unit length,Iis the current through the solenoid, andzisthe symmetry axis with its sense determined by a right-hand rule from the current flow in theturns. From this formula, the solenoid lengthℓ, areaA, and volumeVvol, and Faraday’s law ofinductionE=−dΦdt,one can easily calculate the ideal solenoid inductance to be:a)L=μ0n2Vvolℓ/A.b)L=μ0n2Vvol.c)L=μ0n2VvolA/ℓ.d)L=μ0n2.e)L=μ0nVvolA/ℓ.032 qmult 00410 1 1 1 easy memory: RL circuit behavior
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