Two tightly wound solenoids have the same length and circular cross-sectional area. But solenoid 1 uses wire that is 1.7

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answerhappygod
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Two tightly wound solenoids have the same length and circular cross-sectional area. But solenoid 1 uses wire that is 1.7

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Two tightly wound solenoids have the same length and circularcross-sectional area. But solenoid 1 uses wire that is 1.7 times asthick as solenoid 2.
Part A. What is the ratio of their inductances? (L2/L1)
Part B. What is the ratio of their inductive time constants(assuming no other resistance in the circuits)? (Roe1/Roe2)
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