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Solve the following questions:

Question 1: Calculate the self-inductance of a 51.0 cm long, 10.0 cm diameter solenoid having 1000 loops.

(mH)

Question 2: How much energy is stored in this inductor when 21.5 A of current flows through it?

(J)

Question 3: How fast can it be turned off if the induced emf cannot exceed 3.00 V?

(s)

I need help for above questions.

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