Question during a 63-ms interval a change in the current in, Ask an Expert

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Question: During a 63-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 6.7-mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 ohm. The mutual inductance between the two coils is 3.2 mH.

Part A: What is the change in the primary current?

I need help to find the change in the primary current.

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