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A 3.0cm diameter circular coil with 31 turns of wire has resistance 1.4? . This coil...

A 3.0cm diameter circular coil with 31 turns of wire has resistance 1.4? . This coil is placed inside a solenoid, with coil and solenoid axes aligned. The solenoid has 3100 turns and is 26cm long.
At what rate must the current in the solenoid be increased to induce a 1.3mA current in the coil?

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