A solenoid of length l = 0.7 m and radius R = 5 cm stores an amount of energy U = 6 × 10^-6 J when a current I = 0.4 A passes through it. What is the winding density of the solenoid? A)865 turns /m B)472 turns/m C)1078 turns/m D)104 turns/m E)327 turns /m

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The Answer of A solenoid of length l = 0.7 m and radius R = 5 cm stores an amount of energy U = 6 × 10^-6 J when a current I = 0.4 A passes through it. What is the winding density of the solenoid? A)865 turns /m B)472 turns/m C)1078 turns/m D)104 turns/m E)327 turns /m

A Solenoid of Length L = 0