A 2.50-mH toroidal solenoid has an average radius of 6.00
Chapter 30, Problem 30.7(choose chapter or problem)
A 2.50-mH toroidal solenoid has an average radius of 6.00 cm and a cross-sectional area of 2.00 cm2 . (a) How many coils does it have? (Make the same assumption as in Example 30.3.) (b) At what rate must the current through it change so that a potential difference of 2.00 V is developed across its ends?
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