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2. A solenoid has length of 5.2 cm and a cross-sectional area of 0.0012 m2. The solenoid's self- induction is 0.0014 H. a) Find the

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2. A solenoid has length of 5.2 cm and a cross-sectional area of 0.0012 m2. The solenoid's self- induction is 0.0014 H. a) Find the required number of turns. b) If the length of the solenoid is increased to 10.4 cm while the cross sectional area and the self-induction kept unchanged, calculate the required number of turns

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